Ref #207 - Fix minor issues about database

- Run makemigrations for each app separately in Dockerfile
- Set HOST to database in settings

backend/Dockerfile

@@ -7,6 +7,6 @@ RUN pip install -r requirements.txt
 ADD . /
 WORKDIR /
 
-CMD python manage.py makemigrations && python manage.py migrate && python manage.py runserver 0.0.0.0:9000
+CMD python manage.py makemigrations authentication && python manage.py makemigrations eventposts && python manage.py migrate && python manage.py runserver 0.0.0.0:9000
 
 EXPOSE 9000

backend/app/settings.py

@@ -103,7 +103,7 @@
 
         'PASSWORD': os.environ.get('POSTGRES_PASSWORD', None),
 
-        'HOST': 'localhost' if DEBUG else 'database',
+        'HOST': 'database',
 
         'PORT': '5432',