minor fixes

app/.flake8

@@ -2,5 +2,5 @@
 exclude =
     migrations,
     __pycache__,
-    manage.py
+    manage.py,
     settings.py

docker-compose.yml

@@ -13,15 +13,14 @@ services:
       - ./app:/app
     command: >
       sh -c " python manage.py waitForDB && 
-              sleep 5 &&
               python manage.py migrate &&
               python manage.py runserver 0.0.0.0:8000"
     environment:
       - DB_HOST=db
       - DB_NAME=devdb
       - DB_USER=devuser
       - DB_PASS=jabajaba
-      - DB_PORT=5432
+
     depends_on:
       - db