I wanted to set up a prometheus machine for me to monitor random stuff, but I was always postpone that because I didn’t want to use SSH port-forwarding, firewalls, create a VPC and/or setup an OpenVPN server or anything like that. I just wanted something simple to maybe authenticate with github and go on. Looking into some random GitLab wiki (I don’t remember which one specifically), I found about oauth2_proxy, and it seemed like a good idea.