Moved docker files to contrib, added documentation

Dockerfile-proxy

@@ -1,2 +0,0 @@
-FROM nginx:alpine
-COPY nginx.conf /etc/nginx/nginx.conf

README.md

@@ -82,6 +82,19 @@ PRODUCTION_REMOTE       # Same as STAGING_REMOTE but for the production environm
 PRODUCTION_REMOTE_PATH  # Same as STAGING_REMOTE_PATH but for the production environment
 ```
 
+### Docker container
+To build the `engelsystem` and the `engelsystem-nginx` container:
+```bash
+cd contrib
+docker-compose build
+```
+
+or to build the containers separately
+```bash
+docker build -f contrib/Dockerfile . -t engelsystem
+docker build -f contrib/nginx/Dockerfile . -t engelsystem-nginx
+```
+
 #### deploy.sh
 The `deploy.sh` script can be used to deploy the engelsystem. It uses rsync to deploy the application to a server over ssh.
 

contrib/docker-compose.yml

@@ -1,23 +1,31 @@
-version: "3.3"
+version: "3.6"
 services:
   nginx:
+    image: engelsystem-nginx
     build:
-      context: .
-      dockerfile: Dockerfile-proxy
+      context: ..
+      dockerfile: contrib/nginx/Dockerfile
     ports:
       - 5000:80
     volumes:
       - static:/var/www/html
+    depends_on:
+      - engelsystem
   engelsystem:
-    build: ./
+    image: engelsystem
+    build:
+      context: ..
+      dockerfile: contrib/Dockerfile
     environment:
-      MYSQL_HOST: db
+      MYSQL_HOST: database
       MYSQL_USER: engelsystem
       MYSQL_PASSWORD: engelsystem
       MYSQL_DATABASE: engelsystem
     volumes:
       - static:/var/www/html
-  db:
+    depends_on:
+      - database
+  database:
     image: mariadb:latest
     environment:
       MYSQL_DATABASE: engelsystem

contrib/nginx/Dockerfile

@@ -0,0 +1,2 @@
+FROM nginx:alpine
+COPY contrib/nginx/nginx.conf /etc/nginx/nginx.conf