Question General questions about running Unity on a linux server.

I've got a requirement where I need to send some json from game clients to and from a server and that server has to send some json to and from another API. Right now, I'm using a LAMP stack and I'd like to phase out the php portion on my server and replace it with a Unity server process running monobehavior code processes. In doing some research, I see a mish mash of solutions but I don't see a lot of information direct from Unity on it.

1. Can 2021.3 run on a Linux server in a headless type of configuration?
2. I know Unity can process outbound web requests, can it handle inbound web requests?