Fix an almost working config file in LUA for nginx (reverse proxy)

I have more than 5 years experience with nginx and 20+ years experience with Apache. I have also used lua as a separate language and within nginx using the nginx-lua package for openresty. I have also worked extensively on reverse proxy arrangements with nginx for node.js, golang, lua and other services Depending on your lua configuration I can fix the issue as per your requirements.

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