centos – FleetDM deployment – Server Fault

Has anyone deployed a FleetDM instance locally? I’ve tried both their (now apparently outdated) CentOS deploy steps and also docker composeing the official image, combined with MySQL and Redis. My problem is, I’m consistently getting the response Client sent an HTTP request to an HTTPS server. when trying to visit and/or configure the installation.

Is there any way to resolve that HTTPS issue? I’ve already generated self-signed certificates, but the above response is consistent. It doesn’t give me any option to ignore certificates in-browser, but does return a 200 when I requests.get("https://localhost:8080", verify=False) in REPL.