Reinstate browser native server functionality for live view.

[abose]

Reinstate browser native server functionality for live view.
We can simulate a web server in the browser using a mix of service workers and file system emulation layer pioneered by Mozilla bramble.

Related reading: https://humphd.github.io/browser-shell/
https://github.com/humphd/nohost

[abose]

The server is integrated.
Live view integration task tracked here: #29