This fixes #302 by temporarily forking `detect-port`.
Hopefully this fix will be merged into the original project, and we can refer to it again.

This seems to work best, both on Windows, OS X, and Linux

Also fixes #194

Fixes #38

Local npm start and npm run build got broken by #33

* Make errors and warnings nicer

* Fix license stripping to not be eager

* Minor tweaks

Summary:

Test Plan:

Reviewers:

CC:

Task ID: #