Add sqlite-config file back in

- required for CI steps
- might refactor this out later on

docker/sqlite-config.env

@@ -0,0 +1,10 @@
+# InvenTree environment variables for a development setup
+
+# Set DEBUG to False for a production environment!
+INVENTREE_DEBUG=True
+INVENTREE_DEBUG_LEVEL=INFO
+
+# Database configuration options
+# Note: The example setup is for a PostgreSQL database (change as required)
+INVENTREE_DB_ENGINE=sqlite
+INVENTREE_DB_NAME=/home/inventree/dev/inventree_db.sqlite3