Refactoring docker-compose.postgresql.yml

- Do not require duplication of username / password values
- Specify different env file
- Move to a new child directory which simplifies setup

docker/production/.env

@@ -0,0 +1,19 @@
+# InvenTree environment variables for a postgresql production setup
+
+# Note: If your production setup varies from the example, you may want to change these values
+
+# Ensure debug is false for a production setup
+INVENTREE_DEBUG=False
+INVENTREE_LOG_LEVEL=WARNING
+
+# Database configuration options
+# Note: The example setup is for a PostgreSQL database (change as required)
+INVENTREE_DB_ENGINE=postgresql
+INVENTREE_DB_NAME=inventree
+INVENTREE_DB_HOST=inventree-db
+INVENTREE_DB_PORT=5432
+INVENTREE_DB_USER=pguser
+INVENTREE_DB_PASSWORD=pgpassword
+
+# Enable plugins?
+INVENTREE_PLUGINS_ENABLED=False