First i wanted to beg you for Astro-support.

However I think the main problem with the current solution and the reason for those "Please support Framework X" is the lack of configurational decisions the user is allowed to to make.

I would be utterly excited (and i guess it would make things easier on the long term for you) if there was the ability to configure the playcode's sandbox like the one over at

By allowing configuration of port and startup-script this might solve most of the requests regarding frameworks and make this tool so much more useable.

However this might require possibilities to edit package.json (at least the scripts part)