4KHDHub streams get 403 on selfhosted

[derrickb]

I've set up the addon on my Oracle VPS behind Traefik and has a https domain.

Streams from VixSrc, VidZee, etc. work but 4KHDHub streams receive 403. The public addon instance doesn't have this issue.

I assume we need to use something like FlareSolverr, but I don't see .env variables for setting this up.