Adds modified docker-compose and supporting nginx

Some of the changes for nginx are based on #8

There are two main additions here:

`docker-comose.yaml`:
- Adds an updated docker-compose.yaml with:
  - Renamed services: We need to integrate the signal documentation services into an existing docker-compose setup. It will be easier to manage them all if we have some ability to tell them apart, so we add "sd" as a prefix in a few places.
  - Renamed containers: Similar to the above, this gives us a little bit of differentiation when building/running the images
  - Shell-style variable (`${}`) "markup" around container image names that will be used by CI when building the images. Essentially CI will add a registry and tag information into the `${}` variable placeholders.
  - Adds `image` keys to the services so that CI can build container images from docker-compose.
  - Adds the nginx container services that we will run in the production context for serving static files.

`default.conf.template`:
- Updates to proxy to the sdwebapp services name
- Updates the static file location to use the same bind mounted direcotry that the web application uses to store the generated static files when it runs

Author: korlaxxalrok

docker-compose.yaml

@@ -7,7 +7,7 @@ services:
     container_name: signal_documentation-db
     restart: always
     env_file:
-     - ./.env
+      - ./.env
     environment:
       MYSQL_DATABASE: ${MYSQL_DATABASE}
       MYSQL_USER: ${MYSQL_USER}
@@ -18,11 +18,13 @@ services:
     ports:
       - "3306:3306"
 
-  webapp:
+  sdwebapp:
+    image: ${REGISTRY}signal_documentation-webapp${TAG}
     build: .
     env_file:
-     - ./.env
-    container_name: signal_documentation-web
+      - ./.env
+    container_name: signal_documentation-webapp
+    restart: on-failure
     command: sh -c "python3 /usr/src/signal_documentation/src/manage.py migrate --noinput &&
                     python3 /usr/src/signal_documentation/src/manage.py collectstatic --noinput &&
                     python3 /usr/src/signal_documentation/src/manage.py loaddata ./fixtures/available_geography.json &&
@@ -44,6 +46,20 @@ services:
     ports:
       - "6379:6379"
 
+  sdnginx:
+    image: ${REGISTRY}signal_documentation-nginx${TAG}
+    build: ./nginx
+    env_file:
+      - ./.env
+    container_name: signal_documentation-nginx
+    restart: on-failure
+    volumes:
+      - ./src/staticfiles:/staticfiles
+    ports:
+      - "80:80"
+    depends_on:
+      - sdwebapp
 volumes:
   mysql:
   webapp:
+  static:

nginx/default.conf.template

@@ -1,16 +1,17 @@
 server {
 	listen 80;
-	server_name _;
+	server_name sdnginx;
 
-	location / {
+    location /static/ {
+        autoindex on;
+        alias /staticfiles/;
+    }
+
+    location / {
+        proxy_pass http://sdwebapp:8000/;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 		proxy_set_header Host $http_host;
 		proxy_set_header X-Real-IP $remote_addr;
-		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 		proxy_set_header X-Forwarded-Proto $scheme;
-		proxy_pass http://${APP_HOST}:8000;
-	}
-
-	location /usr/src/signal_documentation {
-		alias /static/;
-	}
+    }
 }