you can only do this on personal computers
step 1: find proxy of choice and navigate to their GitHub page
step 2: deploy proxy into your own .github.io link
popular proxy github pages:
https://github.com/NebulaServices
https://github.com/binary-person/rammerhead
https://github.com/holy-unblocker/website-aio
https://github.com/InterstellarNetwork/Interstellar