Build and Push a Docker Image in CI

The final pipeline stage for most services: build an image and publish it to a registry. Extend the workflow with Docker build and push steps.

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01Requirements

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01
Add registry login
docker/login-action@v3 authenticates against Docker Hub (or GHCR). Credentials come from repository secrets — never hardcode them.
echo ' - uses: docker/login-action@v3' >> ~/project/.github/workflows/ci.yml
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Take a hint without losing the lab — each one points at the thing to look at, not at the answer.

guides, never solves

Tell me what you're stuck on — I'll nudge, not solve. Which requirement are you looking at?

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