Oauth not valid behind reverse proxy

Salut/Hello @pierreozoux,

I manage to make it work by adding :

nginx['proxy_set_headers'] = {
  "Host" => "$http_host",
  "X-Real-IP" => "$remote_addr",
  "X-Forwarded-For" => "$proxy_add_x_forwarded_for",
  "X-Forwarded-Proto" => "https",
  "X-Forwarded-Ssl" => "on"
}

and also this I think :

mattermost_nginx['proxy_set_headers'] = {
"Host" => "$http_host",
"X-Real-IP" => "$remote_addr",
"X-Forwarded-For" => "$proxy_add_x_forwarded_for",
"X-Forwarded-Proto" => "https",
"X-Forwarded-Ssl" => "on"
}

In my gitlab.rb

I am not really sure because I got it work but I did not liked Mattermost, I move to RocketChat.
I thought that Mattermost would be integrated inside GITLAB but it is not like this.

Hope that it helped you,

Bye