add secret key and hosts

Author: raphaeltm

samples/django-postgres/compose.dev.yaml

@@ -47,6 +47,8 @@ services:
     environment:
       - DEBUG=True
       - POSTGRES_PASSWORD=password
+      - SECRET_KEY=-x!x@_u71m7*cbb0ggh2w8**w_#of43q@ht05-h9gdwz9+1_pd
+      - ALLOWED_HOSTS=*
     volumes: 
       - "./app:/code"
     command: python manage.py runserver 0.0.0.0:8000