The coding environment was built with another project I'm working on called Cannon (https://cannon.cryingpotato.com/) that aims to let you embed codeblocks of any language in your browser. Right now the Go environment runs on a Modal backend using their sandbox, but I'm hoping to use the excellent work done on Hackpad (https://github.com/hack-pad/hackpad/tree/main) to run the whole thing in your browser, with no network calls necessary, soon.
Let me know what you think - week 3 is coming out soon!