This appears to be a TeslaMate installer rather than malware, but it needs review because it makes broad server security changes and uses risky credential and image-source practices.
Install only on a dedicated Debian/Ubuntu host you are comfortable reconfiguring. Prefer SSH keys with verified host keys, avoid password SSH/sshpass, generate unique TeslaMate encryption and database secrets before exposing the service, restrict ports 3000/4000/1883 with a firewall or reverse proxy, back up existing Docker configuration first, and do not use the GitHub image fallback unless you independently trust that repository.