diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..c23f0dc
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1 @@
+open_collective: ponyc
diff --git a/.github/linters/.markdown-lint.yml b/.github/linters/.markdown-lint.yml
new file mode 100644
index 0000000..67d2ae5
--- /dev/null
+++ b/.github/linters/.markdown-lint.yml
@@ -0,0 +1,3 @@
+{
+  "MD013": false
+}
diff --git a/.github/workflows/add-discuss-during-sync.yml b/.github/workflows/add-discuss-during-sync.yml
new file mode 100644
index 0000000..46d3f13
--- /dev/null
+++ b/.github/workflows/add-discuss-during-sync.yml
@@ -0,0 +1,29 @@
+name: Add discuss during sync label
+
+on:
+  issues:
+    types:
+      - opened
+      - reopened
+  issue_comment:
+    types:
+      - created
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - ready_for_review
+      - reopened
+  pull_request_review:
+    types:
+      - submitted
+
+jobs:
+  add-label:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Add "discuss during sync" label to active GH entity
+        uses: andymckay/labeler@467347716a3bdbca7f277cb6cd5fa9c5205c5412
+        with:
+          repo-token: ${{ secrets.PONYLANG_MAIN_API_TOKEN }}
+          add-labels: "discuss during sync"
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
new file mode 100644
index 0000000..9800ad8
--- /dev/null
+++ b/.github/workflows/pr.yml
@@ -0,0 +1,64 @@
+name: PR
+
+on: pull_request
+
+jobs:
+  lint-entrypoint-py:
+    name: Lint entrypoint.py
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: pylint
+        run: make pylint
+
+  superlinter:
+    name: Lint bash, docker, markdown, and yaml
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Lint codebase
+        uses: docker://github/super-linter:v3.8.3
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VALIDATE_ALL_CODEBASE: true
+          VALIDATE_BASH: true
+          VALIDATE_DOCKERFILE: true
+          VALIDATE_MD: true
+          VALIDATE_YAML: true
+
+  validate-public-release-image-builds:
+    name: Validate public release image builds
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Docker build
+        run: make build-release config=public
+
+  validate-public-latest-image-builds:
+    name: Validate public latest image builds
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Docker build
+        run: make build-latest config=public
+
+  validate-private-release-image-builds:
+    name: Validate private release image builds
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Docker build
+        run: make build-release config=private
+        env:
+          MATERIAL_INSIDERS_ACCESS: ${{ secrets.MATERIAL_INSIDERS_ACCESS }}
+
+  validate-private-latest-image-builds:
+    name: Validate private latest image builds
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Docker build
+        run: make build-latest config=private
+        env:
+          MATERIAL_INSIDERS_ACCESS: ${{ secrets.MATERIAL_INSIDERS_ACCESS }}
+
diff --git a/.github/workflows/remove-discuss-during-sync.yml b/.github/workflows/remove-discuss-during-sync.yml
new file mode 100644
index 0000000..c4d7d6d
--- /dev/null
+++ b/.github/workflows/remove-discuss-during-sync.yml
@@ -0,0 +1,19 @@
+name: Remove discuss during sync label
+
+on:
+  issues:
+    types:
+      - closed
+  pull_request_target:
+    types:
+      - closed
+
+jobs:
+  remove-label:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Remove label
+        uses: andymckay/labeler@467347716a3bdbca7f277cb6cd5fa9c5205c5412
+        with:
+          repo-token: ${{ secrets.PONYLANG_MAIN_API_TOKEN }}
+          remove-labels: "discuss during sync"
diff --git a/.github/workflows/update-latest-image.yml b/.github/workflows/update-latest-image.yml
new file mode 100644
index 0000000..eec9735
--- /dev/null
+++ b/.github/workflows/update-latest-image.yml
@@ -0,0 +1,69 @@
+name: Update latest images
+
+on:
+  repository_dispatch:
+    types:
+      - ponyc-musl-nightly-released
+  workflow_dispatch:
+
+concurrency:
+  group: "rebuild-latest-images"
+  cancel-in-progress: true
+
+jobs:
+  rebuild-public-latest-image:
+    name: Rebuild latest public image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v3
+      - name: Login to Docker Hub
+        run: "docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD"
+        env:
+          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+      - name: Build
+        run: make build-latest config=public
+      - name: Push
+        run: make push-latest config=public
+      - name: Send alert on failure
+        if: ${{ failure() }}
+        uses: zulip/github-actions-zulip@35d7ad8e98444f894dcfe1d4e17332581d28ebeb
+        with:
+          api-key: ${{ secrets.ZULIP_SCHEDULED_JOB_FAILURE_API_KEY }}
+          email: ${{ secrets.ZULIP_SCHEDULED_JOB_FAILURE_EMAIL }}
+          organization-url: 'https://ponylang.zulipchat.com/'
+          to: notifications
+          type: stream
+          topic: ${{ github.repository }} scheduled job failure
+          content: ${{ github.server_url}}/${{ github.repository }}/actions/runs/${{ github.run_id }} failed.
+
+  rebuild-private-latest-image:
+    name: Rebuild latest private image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v3
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build
+        run: make build-latest config=private
+        env:
+          MATERIAL_INSIDERS_ACCESS: ${{ secrets.MATERIAL_INSIDERS_ACCESS }}
+      - name: Push
+        run: make push-latest config=private
+      - name: Send alert on failure
+        if: ${{ failure() }}
+        uses: zulip/github-actions-zulip@35d7ad8e98444f894dcfe1d4e17332581d28ebeb
+        with:
+          api-key: ${{ secrets.ZULIP_SCHEDULED_JOB_FAILURE_API_KEY }}
+          email: ${{ secrets.ZULIP_SCHEDULED_JOB_FAILURE_EMAIL }}
+          organization-url: 'https://ponylang.zulipchat.com/'
+          to: notifications
+          type: stream
+          topic: ${{ github.repository }} scheduled job failure
+          content: ${{ github.server_url}}/${{ github.repository }}/actions/runs/${{ github.run_id }} failed.
diff --git a/.markdownlintignore b/.markdownlintignore
new file mode 100644
index 0000000..bca6033
--- /dev/null
+++ b/.markdownlintignore
@@ -0,0 +1,3 @@
+CHANGELOG.md
+CODE_OF_CONDUCT.md
+.release-notes/
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..fb3d39c
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,28 @@
+ARG FROM_TAG=release-alpine
+FROM ponylang/ponyc:${FROM_TAG}
+
+ARG PACKAGE
+
+RUN apk add --update --no-cache \
+  bash \
+  libffi \
+  libffi-dev \
+  libressl \
+  libressl-dev \
+  make \
+  python3 \
+  python3-dev \
+  py3-pip \
+  tar
+
+RUN pip3 install --upgrade pip \
+  gitpython \
+  in_place \
+  mkdocs \
+  ${PACKAGE} \
+  pylint \
+  pyyaml
+
+COPY entrypoint.py /entrypoint.py
+
+ENTRYPOINT ["/entrypoint.py"]
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..a8e32a2
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,25 @@
+BSD 2-Clause License
+
+Copyright (c) 2022, The Pony Developers
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..0bc66bd
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,40 @@
+config ?= public
+
+ifdef config
+	ifeq (,$(filter $(config),public private))
+		$(error Unknown configuration "$(config)")
+	endif
+endif
+
+ifeq ($(config),private)
+	IMAGE := ghcr.io/ponylang/library-documentation-action-v2
+	PACKAGE = "git+https://${MATERIAL_INSIDERS_ACCESS}@github.com/squidfunk/mkdocs-material-insiders.git"
+else
+	IMAGE = ponylang/library-documentation-action-v2
+	PACKAGE = "mkdocs-material"
+endif
+
+all: pylint
+
+build:
+	docker build --pull --build-arg PACKAGE="${PACKAGE}" --build-arg FROM_TAG="${version}-alpine" -t "${IMAGE}:${version}" .
+
+build-latest:
+	docker build --pull --build-arg PACKAGE="${PACKAGE}" --build-arg FROM_TAG="alpine" -t "${IMAGE}:latest" .
+
+build-release:
+	docker build --pull --build-arg PACKAGE="${PACKAGE}" --build-arg FROM_TAG="release-alpine" -t "${IMAGE}:release" .
+
+push: build
+	docker push "${IMAGE}:${version}"
+
+push-latest: build-latest
+	docker push "${IMAGE}:latest"
+
+push-release: build-release
+	docker push "${IMAGE}:release"
+
+pylint: build-latest
+	docker run --entrypoint pylint --rm "${IMAGE}:latest" /entrypoint.py
+
+.PHONY: build pylint
diff --git a/README.md b/README.md
index 14b02c3..14707a4 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,103 @@
 # library-documentation-action-v2
-Generates documentation for Pony libraries
+
+A GitHub Action that generates documentation for a Pony library and updates that documentation on GitHub pages. The library in question must have a Makefile with a target `docs` that can be used to generate the documentation that can be feed to `mkdocs`.
+
+Generated docs can be uploaded for hosting anywhere you like. The examples below show them being hosted on GitHub pages.
+
+You need to supply the url of your site to the action in the `site_url` option. For GitHub pages, that domain will be `https://USER_OR_ORG_NAME.github.io/REPOSITORY_NAME/`.
+
+## Example workflow
+
+In **release.yaml**, in addition the usual [release-bot-action](https://github.com/ponylang/release-bot-action) workflow entries.
+
+```yml
+name: Release
+
+on:
+  push:
+    tags:
+      - \d+.\d+.\d+
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "update-documentation"
+  cancel-in-progress: true
+
+jobs:
+  generate-documentation:
+    name: Generate documentation for release
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Generate documentation
+        uses: ponylang/library-documentation-action@via-github-action
+        with:
+          site_url: "https://MYORG.github.io/MYLIBRARY/"
+          library_name: "MYLIBRARY"
+          docs_build_dir: "build/MY-LIBRARY-docs"
+      - name: Setup Pages
+        uses: actions/configure-pages@v2
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: 'build/MY-LIBRARY-docs/site/'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1
+```
+
+## Manually triggering a documentation build and deploy
+
+GitHub has a [`workflow_dispatch`](https://docs.github.com/en/actions/reference/events-that-trigger-workflows#workflow_dispatch) event that provides a button the actions UI to trigger the workflow. You can set up a workflow to respond to a workflow_dispatch if you need to regenerate documentation from the last commit on a given branch without doing a full release.
+
+We suggest that you install the a `workflow_dispatch` driven workflow to generate documentation the when you first install this action so you don't need to do a superfluous release.
+
+```yml
+name: Manually generate documentation
+
+on:
+  workflow_dispatch
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "update-documentation"
+  cancel-in-progress: true
+
+jobs:
+  generate-documentation:
+    name: Generate documentation for release
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Generate documentation
+        uses: ponylang/library-documentation-action@via-github-action
+        with:
+          site_url: "https://MYORG.github.io/MYLIBRARY/"
+          library_name: "MYLIBRARY"
+          docs_build_dir: "build/MY-LIBRARY-docs"
+      - name: Setup Pages
+        uses: actions/configure-pages@v2
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: 'build/MY-LIBRARY-docs/site/'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1
+```
diff --git a/RELEASE_PROCESS.md b/RELEASE_PROCESS.md
new file mode 100644
index 0000000..84af85c
--- /dev/null
+++ b/RELEASE_PROCESS.md
@@ -0,0 +1,9 @@
+# How to cut a library-documentation-action release
+
+This document is aimed at members of the team who might be cutting a release of library-documentation-action  . It serves as a checklist that can take you through doing a release step-by-step.
+
+## Releasing
+
+There's no release process library-documentation-action. New `release` and `latest` docker images are created each time a new nightly or release version of ponyc is created.
+
+We used to have a release process for the library documentation action, but each time there was a breaking change in ponyc, we had to create a new version of the library-documentation-action and every user had to update the version they were using.  Now, on each release a new version is created.
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..f49f480
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,16 @@
+description: Generates documentation for Pony libraries
+inputs:
+  docs_build_dir:
+    description: Location, relative to the Makefile, that generated documentation
+      will be placed
+    required: true
+  library_name:
+    description: Name of the library being uploaded
+    required: true
+  site_url:
+    description: Url for the site that the documentation will be hosted on
+    required: true
+name: Library Documentation action
+runs:
+  image: Dockerfile
+  using: docker
diff --git a/entrypoint.py b/entrypoint.py
new file mode 100755
index 0000000..a69207e
--- /dev/null
+++ b/entrypoint.py
@@ -0,0 +1,233 @@
+#!/usr/bin/python3
+# pylint: disable=C0103
+# pylint: disable=C0114
+
+import json
+import os
+import os.path
+import shutil
+import sys
+
+import in_place
+import yaml
+
+# Output strings for coloring
+
+ENDC = '\033[0m'
+ERROR = '\033[31m'
+INFO = '\033[34m'
+NOTICE = '\033[33m'
+
+library_name = os.environ['INPUT_LIBRARY_NAME']
+docs_build_dir = os.environ['INPUT_DOCS_BUILD_DIR']
+
+#
+# make the documentation
+#
+
+print(INFO + "Running 'make docs'." + ENDC)
+rslt = os.system('make docs')
+if rslt != 0:
+    print(ERROR + "'make docs' failed." + ENDC)
+    sys.exit(1)
+
+mkdocs_yml_file = os.path.join(docs_build_dir, 'mkdocs.yml')
+docs_dir = os.path.join(docs_build_dir, 'docs')
+index_file = os.path.join(docs_dir, 'index.md')
+source_dir = os.path.join(docs_dir, 'src')
+
+#
+# remove any docs that aren't part of this library
+# store information about removed entries so we can fix up links to them later
+#
+
+print(INFO + "Removing 'other docs'." + ENDC)
+removed_docs = []
+for f in os.listdir(docs_dir):
+    if f in ('assets', 'src', 'index.md'):
+        continue
+
+    if not f.startswith(library_name + '-'):
+        p = os.path.join(docs_dir, f)
+        if os.path.isfile(p):
+            os.remove(p)
+        else:
+            shutil.rmtree(p)
+        removed_docs.append(f)
+
+#
+# remove any source code that isn't part of this library
+#
+
+print(INFO + "Removing 'other sources'." + ENDC)
+for f in os.listdir(source_dir):
+    if f != library_name:
+        p = os.path.join(source_dir, f)
+        if os.path.isfile(p):
+            os.remove(p)
+        else:
+            shutil.rmtree(p)
+
+#
+# - trim mkdocs.yml down to entries for our library
+#   record those packages for later reference
+#
+
+print(INFO + "Trimming mkdocs.yml." + ENDC)
+mkdocs_yml = {}
+packages = []
+with open(mkdocs_yml_file, encoding="utf8") as infile:
+    mkdocs_yml = yaml.load(infile, Loader=yaml.FullLoader)
+    nav = mkdocs_yml['nav']
+
+    new_nav = []
+    library_package_key = 'package ' + library_name
+    library_subpackage_key = 'package ' + library_name + '/'
+    for entry in nav:
+        # there's only 1 entry but we don't know what it is because
+        # well that's how the yaml package represents this thing should be a
+        # 2-element tuple or list
+        for k in entry.keys():
+            if k == library_name:
+                # library index entry. keep it.
+                new_nav.append(entry)
+
+            if k == library_package_key \
+              or k.startswith(library_subpackage_key):
+                # package entry. keep it.
+                # record the package name for later usage
+                new_nav.append(entry)
+                # entry will look like one of:
+                # package semver
+                # package semver/subpackage
+                packages.append(k[8:])
+
+    mkdocs_yml['nav'] = new_nav
+
+# add a site url to fix some /asset links
+# without this, the 404 page will be broken
+mkdocs_yml['site_url'] = os.environ['INPUT_SITE_URL']
+
+with open(mkdocs_yml_file, 'w', encoding="utf8") as outfile:
+    yaml.dump(mkdocs_yml, outfile)
+
+#
+# trim docs/index.md down to entries for our library
+#
+
+print(INFO + "Trimming index.md." + ENDC)
+with in_place.InPlace(index_file) as fp:
+    for line in fp:
+        if not line.startswith('*'):
+            fp.write(line)
+        else:
+            for p in packages:
+                if line.startswith('* [' + p + ']'):
+                    fp.write(line)
+
+#
+# `make docs` at the start will have pulled down any needed dependencies that
+# we might have. Here we are going to reach into the _corral directory to find
+# the `corral.json` for any dependencies and get:
+# - the package names
+# - the location of the documentation_url
+#
+# This should eventually be incorporated into `corral` as a command
+# or something similar. In the meantime, we are doing "by hand" in this
+# action as we work out how to accomplish everything that we want to.
+#
+# This could grab info about "extra" packages as there is on guarantee that a
+# dependency that was removed isn't still in _corral directory assuming that
+# this code was used outside of the context of this action that starts from a
+# clean-slate. That's not an edge condition to worry about at this time.
+#
+# packages provided are listed in `corral.json` in an array with the key
+# `packages`. Every package needs to be listed including those that are
+# "subpackages" so for example, we have package listings for `semver`,
+# `semver/constraint`, and `semver/version`.
+#
+# The documentation_url for a given package is located in the `info` object
+# in the `documentation_url` field.
+#
+
+documentation_urls = {}
+
+if os.path.isdir("_corral"):
+    dependencies_dirs = os.listdir("_corral")
+    for dd in dependencies_dirs:
+        corral_file = "/".join(["_corral", dd, "corral.json"])
+        if not os.path.isfile(corral_file):
+            print(NOTICE + "No corral.json in " + dd + "." + ENDC)
+            continue
+
+        with open(corral_file, 'r', encoding="utf8") as corral_fd:
+            corral_data = json.load(corral_fd)
+            bundle_documentation_url = ""
+            try:
+                bundle_documentation_url = corral_data['info']['documentation_url']
+            except KeyError as e:
+                print(NOTICE + "No documentation_url in " + corral_file + "." \
+                  + ENDC)
+
+            try:
+                packages = corral_data['packages']
+                for p in packages:
+                    documentation_urls[p] = bundle_documentation_url
+            except KeyError as e:
+                print(NOTICE + "No packages in " + corral_file + "." \
+                  + ENDC)
+
+#
+# Go through the markdown belonging to our package and replace missing entries
+# with links to their external sites.
+#
+
+print(INFO + "Fixing links to code outside of our package." + ENDC)
+for f in os.listdir(docs_dir):
+    if f in ('assets', 'src'):
+        continue
+
+    p = os.path.join(docs_dir, f)
+    print(INFO + "Fixing links in " + str(p) + "." + ENDC)
+    with in_place.InPlace(p) as fp:
+        for line in fp:
+            for removed in removed_docs:
+                if removed in line:
+                    print(INFO + "Replacing link for " + removed + "." + ENDC)
+
+                    # get the package name
+                    s = removed.replace('.md', '')
+                    s = s.split('-')
+                    if len(s) > 1:
+                        del s[-1]
+                    package_name = '/'.join(s)
+
+                    # if unknown package, we'll use the standard library
+                    external_url = documentation_urls.get(package_name, \
+                      'https://stdlib.ponylang.io/')
+
+                    # as the external url is input from users, it might not
+                    # include a trailing slash. if not, generated urls will
+                    # be broken.
+                    # there's far more validation we could do here, but in
+                    # terms of helping out a non-malicious user, this is the
+                    # minimum
+                    if not external_url.endswith('/'):
+                        external_url += '/'
+
+                    as_html = removed.replace('.md', '')
+                    link = external_url + as_html + "/"
+                    line = line.replace(removed, link)
+
+            fp.write(line)
+
+#
+# run mkdocs to actually build the content
+#
+
+print(INFO + "Running 'mkdocs build'." + ENDC)
+os.chdir(docs_build_dir)
+rslt = os.system('mkdocs build')
+if rslt != 0:
+    print(ERROR + "'mkdocs build' failed." + ENDC)
+    sys.exit(1)