fix(Docker): Fixed Docker-Compose-Example

The docker-compose example now runs out of the box. Migrations are
applied at startup and cachetable is created.

Closes #141

README.md

@@ -106,14 +106,6 @@ and set, at least, the `ALLOWED_HOSTS` and `SECRET_KEY` variables under
 
         docker-compose up -d
 
-1. Initialize the database *(first run/after migrations updates)*
-
-        docker-compose exec app python manage.py migrate
-        
-1. Initialize cache table *(first run/after cache configuration updates)*
-
-        docker-compose exec app python manage.py createcachetable
-
 The app should now be locally available at
 [http://127.0.0.1:8000](http://127.0.0.1:8000). See
 [Docker's "Get Started" documentation](https://docs.docker.com/get-started/)

babybuddy/settings/docker.py

@@ -9,6 +9,7 @@ DATABASES = {
         'ENGINE': 'django.db.backends.postgresql_psycopg2',
         'NAME': 'postgres',
         'USER': 'postgres',
+        'PASSWORD': os.environ.get('POSTGRES_PASSWORD'),
         'HOST': 'db',
         'PORT': 5432,
     }

docker-compose.example.yml

@@ -1,22 +1,26 @@
 version: "3.7"
 services:
   db:
-    image: postgres
+    image: postgres:11 # pin postgres to a major version
     environment:
       - PGDATA=/db-data
+      - POSTGRES_PASSWORD=postgres # has to correspond with POSTGRES_PASSWORD in APP
     volumes:
       - db:/db-data:rw
   app:
     image: babybuddy/babybuddy
     # See README.md#configuration for other environment configuration options.
     environment:
-      - ALLOWED_HOSTS=
+      - ALLOWED_HOSTS=*
       - DJANGO_SETTINGS_MODULE=babybuddy.settings.docker
-      - SECRET_KEY=
+      - SECRET_KEY=5
-      - TIME_ZONE=
+      - TIME_ZONE=Europe/Berlin
+      - POSTGRES_PASSWORD=postgres
+      - DEBUG=False # Turn to False in production
     volumes:
       - media:/app/media:rw
-    command: gunicorn -c /app/gunicorn.py babybuddy.wsgi
+    # Sleep 5 seconds to allow the db to to come up;
+    command: bash -c 'sleep 5 && python manage.py migrate --noinput && python manage.py createcachetable  && python manage.py collectstatic --noinput && gunicorn babybuddy.wsgi -b :8000 --log-level=info'
     ports:
       - "8000:8000"
     depends_on: