ci: add Dockerfile and Docker image build action #5
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Closes #3 (and #2?).
This adds a Dockerfile and a GitHub Action that builds and pushes the Docker image to GitHub Container Registry. The Docker image contains a statically-linked
tailscale-manager
binary, and is built using GitHub Actions cache: an initial build lasts around 15 minutes 🤯, whereas subsequent builds last less than 30 seconds, given that Cabal dependencies haven't changed.A test image is available at
ghcr.io/samydjemai/tailscale-manager:pr-1
, and there are some workflow runs on my fork PR: SamyDjemai#1I've added an example of how the image can be used in other Docker images, as well as some documentation in
README.md
.Thanks for the useful tool :)