Story

CI was failing on a PR so I ran yarn fmt locally as was suggested in the run output:

$ ./ci/dev/fmt.sh
Files need generation or are formatted incorrectly:
HEAD detached at c2de72a9
  modified:   docs/FAQ.md
  modified:   docs/install.md
Please run the following locally:
 yarn fmt
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

But I received:

./ci/dev/fmt.sh: line 7: shfmt: command not found

which implies there's a non standard package missing from the development requirements, shfmt.

I tried to inspect the image referenced in the contributing documents https://github.com/cdr/code-server/blob/v3.9.0/docs/CONTRIBUTING.md#requirements

But it's a dead link:

https://github.com/cdr/code-server/blob/v3.9.0/ci/images/debian8/Dockerfile