Move postgres data into a non-mounted volume

local.yml

@@ -17,11 +17,11 @@ services:
     env_file:
       - ./local.env
     command: /bin/sh -c "python3 manage.py collectstatic --noinput ; python3 manage.py runserver 0.0.0.0:8000"
-  
+
   db:
     image: mdillon/postgis:9.6-alpine
     volumes:
-      - .containers/db:/var/lib/postgresql/data
+      - postgres-data-volume:/var/lib/postgresql/data
       - ./support/postgres/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
     ports:
       - "127.0.0.1:5432:5432"
@@ -33,9 +33,10 @@ services:
     ports:
       - 1025:1025
       - 8025:8025
-      
+
   cache:
     image: memcached:1.4
 
 volumes:
   weblate-data:
+  postgres-data-volume: