chg (db): use .env file

Author: alexander-gesinn

docker-compose.yml

@@ -62,16 +62,8 @@ services:
       context: postgresql/
     networks:
       - dbnet
-    environment:
-      - POSTGRES_USER
-      - POSTGRES_PASSWORD
-      - POSTGRES_DB
-      - CKAN_DB_USER
-      - CKAN_DB_PASSWORD
-      - CKAN_DB
-      - DATASTORE_READONLY_USER
-      - DATASTORE_READONLY_PASSWORD
-      - DATASTORE_DB
+    env_file:
+      - .env
     volumes:
       - pg_data:/var/lib/postgresql/data
     restart: unless-stopped