- added docker installation

docker.md

@@ -0,0 +1,38 @@
+---
+layout: default
+title: UniTime Docker Installation
+---
+
+## How to use
+
+- Download the latest release of UniTime 4.8.126 or later from [UniTime nightly builds](https://builds.unitime.org/) or [UniTime releases](https://github.com/UniTime/unitime/releases/latest).
+
+- Unzip the downloaded distribution, and go to the `docker` folder.
+
+    ```
+    unzip unitime-4.8_bld126.zip
+    cd docker
+    ```
+
+- Build and deploy docker images using the following command:
+
+    ```
+    docker-compose build && docker-compose up
+    ```
+
+- Once the project has been built and deployed, UniTime should become available at [localhost:8888](http://localhost:8888).
+
+- Log in using `admin` as both user name and password.
+  - Other available credentials are listed at [demo.unitime.org](https://demo.unitime.org).
+
+## Additional Notes
+
+- This is a simple installation much like the [online demo](https://demo.unitime.org), with only one web-server and no dedicated solver server.
+
+- All components (OpenJDK 11, Tomcat 9, and MySQL 8.3) are included in one container.
+
+- No HTTPS included, but a reverse-proxy can be used to provide SSL layer.
+
+- Inspired by [vlatka-sinisa/docker-unitime](https://github.com/vlatka-sinisa/docker-unitime)
+
+- See [UniTime Installation](installation) for traditional installation, customization, etc.

installation.md

@@ -6,6 +6,7 @@ For simplified step by step installation notes, see
 - [Setting up UniTime on Linux](manuals/installation-linux)
 - [Setting up UniTime on Windows](manuals/installation-windows)
 - [Setting up UniTime on Mac](manuals/installation-mac)
+- [Setting up UniTime as Docker container](docker) ***-- UniTime 4.8.126 or later***
 
 ### Table of Contents
 {:.no_toc}