Url mismatch if user is on wrong site

[joe6673]

Describe the bug
Linking to Github will fail if user tries to do so from
https://git-connected.herokuapp.com/
instead of
https://gitconnected.dev/

To Reproduce
Steps to reproduce the behaviour:

1. Go to https://git-connected.herokuapp.com/
2. Try to connect a new profile to Github
3. "Invalid Authentication" will display, along with query string stating redirect_uri_mismatch

Desktop (please complete the following information):

• OS: Mac High Sierra 10.13.16
• Browser : chrome
• Version: 102