deno run --unstable --no-check --location https://localhost mod.js--location https://localhost is required to stop an error from cliffy calling location.
This will create and modify files in ./tmp/
To compile an executable binary that can be run anywhere:
deno compile --unstable --no-check --location http://localhost --output ./tmp/grading mod.js --client={GITHUB_CLIENT_ID}
I suggest using gvisor to create sandboxed environments for grading, this will set up a container ready to run the grading program.
docker build -t grading .
docker run --runtime=runsc --rm -it grading