I have done that. I am VERY confident about setting up dash on my local machine. Setting it up on a cloud server where it is harder to work with, and will read a real-time updating database, that has been another thing entirely!
That said, THANKS for your all your notes. VERY HELPFUL. I’m going for a walk but will look at the global variable. I do believe you should put some of what you wrote above in the documentation. Reading other posts many people have been confused by the server = app.server line. Seem’s you’re saying the flask is a test appendage, but the real work of the dash app is served (the routes) through its server() function.