| name | docker-build-push |
| description | Build and push multi-platform Docker images to Google Artifact Registry. Use when user asks to build, push, or deploy a Docker image with a tag. Triggers: "build and push", "push docker image", "build with tag", "deploy image". |
Docker Build and Push
Build and push multi-platform Docker images to the melosys-api Google Artifact Registry.
This repo-local skill intentionally overrides the global docker-build-push,
which auto-detects the image name from the cwd (basename of the git root)
and would mis-name images in parallel checkouts like melosys-api-claude.
Image name — ALWAYS melosys-api
The image repository is always melosys-api, never the cwd directory name.
Parallel workspaces may be checked out as melosys-api-claude, melosys-api-2,
etc., but the published image name never changes.
Registry
europe-north1-docker.pkg.dev/nais-management-233d/teammelosys/melosys-api
Build and Push Command
docker buildx build --platform linux/amd64,linux/arm64 \
-t europe-north1-docker.pkg.dev/nais-management-233d/teammelosys/melosys-api:TAG \
--push .
Replace TAG with user-specified tag.
Workflow
The Dockerfile is single-stage (distroless) and copies a pre-built JAR
(COPY /app/target/melosys-sb-execution.jar) — it does NOT build the JAR
itself. So you must produce the JAR before the buildx build whenever code
changed or app/target/ has no current JAR.
- Build the JAR first:
make build-fast (mvn clean install -DskipTests)
- Run buildx build with
--push — keep the image path exactly as shown above
- Report: tag, platforms, manifest digest
- Before reporting "done", verify the
-t argument ends with /melosys-api:TAG
(not /melosys-api-claude:TAG or any other variant)
Setup (if buildx not configured)
docker buildx create --name multiplatform --use --driver docker-container || docker buildx use multiplatform
Error Handling
Authentication expired
Message: "Reauthentication failed"
Solution: Ask user to run gcloud auth login, then retry
No matching manifest for linux/amd64
Cause: Image built only for arm64
Solution: Use --platform linux/amd64,linux/arm64 flag
Output Format
After successful push:
Done!
Image details:
- Tag: europe-north1-docker.pkg.dev/.../melosys-api:TAG
- Platforms: linux/amd64, linux/arm64
- Manifest digest: sha256:...
