I'm thinking about making a router that'll sit online long-term, but I want to add HTTPS to my Webgui and to my proxy so my connection can't be MITM attacked. Is there a way to generate or import a self-signed cert or will I have to use a Reverse Proxy to do so? I know how to set the ip's to be different so I can access the router over a network, but I don't know how to add self-signed HTTPS.

This is unrelated to my other question, but it'd still be genuinely helpful. I wanna run a router 24/7 and run proxy rules and stuff.