Native CrOS Support #738

#225 has proposed two methods of installing code-server on CrOS (using Crostini and Crouton).
I have tried Nick's method (do not use Crosini or Crouton) but the problem is that all the extensions of vscode are invalid then.
I can use Chromebrew to install packages but I don't know what the prerequisites of the binary in ``Releases'' page.
The screenshots of code-server and web client (PWA app) are as follows:
code-server
web client