Added the postgres container to the network

docker-compose.yml

@@ -3,22 +3,17 @@ version: '3'
 services:
 
   postgres:
-    image: postgres:9.5
+    image: postgres:9.6
     restart: always
+    networks:
+      - default
+    volumes:
+      - data/staging:/var/lib/postgresql/data
 
   grady:
     image: docker.gitlab.gwdg.de/j.michal/grady:master
     command:
-      - /bin/sh
-      - -c
-      - |
-        sleep 5
-        python manage.py migrate --noinput
-        gunicorn \
-          --bind 0.0.0.0:8000 \
-          --workers=2 \
-          --worker-class=gevent \
-          grady.wsgi:application
+      - ./deploy.sh
     depends_on:
       - postgres
     restart: always