When running `pip3 install --user -r zephyr/scripts/requirements.txt`
(last step on https://zmk.dev/docs/development/setup), grpcio install
fails with the following error:
FileNotFoundError: [Errno 2] No such file or directory: c++: c++
This happens due to missing dev tooling in the container.
* Some runtimes (e.g. podman), require explicit registries in image URLs
or will prompt for the user to select one, which breaks things like
VSCode remote container rebuilds.
Brings back the dockerfile so we can install SSH and GPG into it.
This fixes git actions with SSH remotes, and GPG signing now
works out of the box.
This commit was made from inside the container!
