Update 'README.md'

Added line with instructions to run using gunicorn

README.md

@@ -1,4 +1,8 @@
 # Checklist
 
-A web based app to add and check items off a list, which outputs a page that can be set up as a browser source in OBS.
-
+A web based app to add and check items off a list, which outputs a page that can be set up as a browser source in OBS.
+
+## Run with:
+ 
+```.venv/bin/python -m gunicorn -b 0.0.0.0:8043 -w 1 'app:app'
+