Documentation for running with dfx is out-of-date

[kritzcreek]

The README.md states:

The ic-ref program starts a webserver at http://0.0.0.0:8001/ that implements the Internet Computer interface, and can be used with dfx --client http://0.0.0.0:8001/.

But dfx doesn't understand that command. I think at this point the correct way to do this is to use icx-proxy, right? We should update the docs to reflect that.

[nomeata]

You only need icx-proxy if you want HTTP gateway feature.

The above refers to dfx-the-CLI-agent, but it no longer has that parameter. Instead, you need to configure a ephemeral network in dfx.json. or tell ic-ref to use the port of the default local network.