Request: admin documentation

[suhancz]

Hi, I love JetKVM so far, but needs plenty of reverse engineering to get it into my infrastructure. I'd appreciate documentation on the following topics:

• OS package management (I have opened a pull request for Entware as I couldn't figure out if there is a package manager at all)
• TCP/UDP port layout (this would help people who prefer to avoid Google from remote access and set up proper NAT rules)
• Config file reference

Thank you in advance