The solution that @jroper provided in #3246 works, but from my experience it doesn't work with static assets such as HTML and JavaScript files that are not templates (doesn't matter if they're in the public folder or the app/assets folder). Rather, one has to stop, compile, and run again manually to get the changes to take effect. As an additional pain point, this unnecessarily kills sessions. It can take a pretty big toll on productivity.
If it matters, I'm also running Activator in a Docker container.
Is there a solution for this that I'm missing?