Feature/improves multiple databases support (#561)

* feat: adds docker local files to ignore

* feat: adds replica key to django q settings

* feat: adds multiple database routers testing utility

* feat: ensures scheduler works with multiple databases and replicas

* feat: adds docker image to support containerized development

* refactor: removes unnecessary import

* style: improves import styling

* docs: adds replica setting to configure documentation

.gitignore

@@ -71,3 +71,4 @@ node_modules
 /c.cache/
 /dq
 /venv/
+.local