update pre-commit hook configuration

[ongardie]

The pre-commit hooks are difficult for people to run right now, mostly for historical reasons/I'm lazy.

The best docs are presently buried here: #184 (comment)

It should be entirely possible to have a default conifg that works out of the box by listening on 127.0.0.1 on various ports. There shouldn't be any need for sudo anymore to set up virtual IPs.

cc @jujing