Add link to Github so users can file/fix issues

[bterlson]

[JonathanDn]

Hey @bterlson I would love to try and contiribute a bit to this project, could you fill a bit of technichal details how to run the app, what it is about?(in the README)

After having that elaborated I would love to learn where would you like this link to github to show?

[rpavlik]

I have a footer with this info in my fork - not directly upstreamable since it mentions I have a fork :) https://github.com/rpavlik/tcq/commit/368cd72c62a3dbbcd767afc4620b2cac0eb13bdd but I'd be happy to revise that as needed and upstream it.

It looks like this: I could drop the second line, since your version only works on GitHub. (Mine also works on GitLab)