Refactor much needed docker setup

- Build static files inside seperate container
- Remove unnecessary env variables

docker-compose.yml

@@ -1,52 +1,56 @@
 version: '3'
+volumes:
+  postgres-data:
+  static-files:
+  node-modules:
 
 services:
   db:
-    # See https://hub.docker.com/_/postgres
     image: postgres
-    container_name: postgres
     environment:
-      - POSTGRES_DB=$POSTGRES_NAME
-      - POSTGRES_USER=$POSTGRES_USER
-      - POSTGRES_PASSWORD=$POSTGRES_PASSWORD
+      POSTGRES_DB: "newsreader"
+      POSTGRES_USER: "newsreader"
+      POSTGRES_PASSWORD: "newsreader"
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
   rabbitmq:
     image: rabbitmq:3.7
-    container_name: rabbitmq
-  celery:
-    build: .
-    container_name: celery
-    command: poetry run celery -A newsreader worker -l INFO --beat --scheduler django --workdir=/app/src/
-    environment:
-      - POSTGRES_HOST=$POSTGRES_HOST
-      - POSTGRES_NAME=$POSTGRES_NAME
-      - POSTGRES_USER=$POSTGRES_USER
-      - POSTGRES_PASSWORD=$POSTGRES_PASSWORD
-      - DJANGO_SETTINGS_MODULE=newsreader.conf.docker
-    volumes:
-      - .:/app
-    depends_on:
-      - rabbitmq
   memcached:
     image: memcached:1.5.22
-    container_name: memcached
     ports:
       - "11211:11211"
     entrypoint:
       - memcached
       - -m 64
-  web:
-    build: .
-    container_name: web
+  celery:
+    build:
+      context: .
+      dockerfile: ./docker/django
+    command: celery worker --app newsreader --loglevel INFO --beat --scheduler django --workdir /app/src/
+    environment:
+      - DJANGO_SETTINGS_MODULE=newsreader.conf.docker
+    depends_on:
+      - rabbitmq
+  django:
+    build:
+      context: .
+      dockerfile: ./docker/django
     command: src/entrypoint.sh
     environment:
-      - POSTGRES_HOST=$POSTGRES_HOST
-      - POSTGRES_NAME=$POSTGRES_NAME
-      - POSTGRES_USER=$POSTGRES_USER
-      - POSTGRES_PASSWORD=$POSTGRES_PASSWORD
       - DJANGO_SETTINGS_MODULE=newsreader.conf.docker
-    volumes:
-      - .:/app
     ports:
       - '8000:8000'
     depends_on:
       - db
+    volumes:
+      - .:/app
+      - static-files:/app/src/newsreader/static
+  webpack:
+    build:
+      context: .
+      dockerfile: ./docker/webpack
+    command: npm run build:watch
+    volumes:
+      - .:/app
+      - static-files:/app/src/newsreader/static
+      - node-modules:/app/node_modules