fix: destructure of adapter config error

[jthegedus]

Summary

Investigating #6 uncovered two errors:

1. adapter logging was no longer advising the user how to setup their server
2. adapter configuration did not support an empty config as the object param did not have a default set so tried to destructure undefined

Fixes were included:

1. in fix: elevate logs to .warn & check CFs for @sveltejs/kit dep #9
2. is being fixed here

Fixes: #6

Other Information

This PR also fixes an issue with the pre-commit hook introduced in #10 It now adds to formatted code to the current commit.

[jthegedus]

Integration tests would have revealed issue 2., consider adding these later