making COOKIE_SECRET an env var

[kulp006]

make COOKIE_SECRET an env var instead of checking in proxy.config.json

git-proxy/proxy.config.json

Line 3 in fd63848

"cookieSecret": "cookie secret",

[JamieSlome]

Thanks for creating the issue @kulp006. Can you explain what your requirement is or why you think this should be the case?

[coderhs]

I am guessing the recommendation to use ENV variable is to make sure that new installations changes it. I can work on it if the request is still valid.

[Aditya-PS-05]

Can you assign me this task?

[JamieSlome]

@Aditya-PS-05 - sure!

[Aditya-PS-05]

@JamieSlome , Please review my pr.