Add func to serve local file

[realPy]

Hi agnivade,

I'm using this feature since month ago , but now , i really NEED it for the "worker services" test of hogosuru.

Case of test:

"When i want test worker services, i must install a dummy worker service js file". This file must be in the same domain (localhost) or must use an external https static files. It's weird to serve this file in another place than the repo himself.

Can you reevaluate your position on the subject?

[agnivade]

Hey @realPy - I forgot that this PR was there. We have now merged #34 so this can go it provided it's gated with a flag. Would you mind updating the PR with the necessary changes?

[agnivade]

Closing due to inactivity. Feel free to comment to reopen.