Support Chromium and configurable Chrome Path

[holsee]

Short term goal would be to support configuration of the path (as per other configuration through environment variables).

This function would need to be modified: https://github.com/holsee/chroxy/blob/a1997bd12c26dbd62c6653405af8c99b7fb01f87/lib/chroxy/chrome_server.ex#L347-L354

From early testing, Chromium was fully compatible.

[eahanson]

FWIW, I'm able to set a different browser path with:

config :chroxy, Chroxy.ChromeServer, chrome_path: System.get_env("CHROXY_CHROME_PATH")

in my own app's config.exs when using Chroxy as a library.

Is the implementation of this feature just adding the above line to Chroxy's config.exs?

[holsee]

Looks like I have implemented this and forgot: https://github.com/holsee/chroxy/blob/a1997bd12c26dbd62c6653405af8c99b7fb01f87/lib/chroxy/chrome_server.ex#L132-L137

I would suggest we document this in the README or we add that ENV VAR as something baked in that will take the first precedence.

Documentation should be fine.