Quick cheat sheet for building Docker images and pushing them to GCR.

Build the Image

docker build -t <image_name>:<image_version> .

If you’re on Apple Silicon (M1/M2), target x86 to avoid surprises on Linux:

docker build --platform linux/amd64 -t <image_name>:<image_version> .

List local images:

docker images

Tag for GCR

docker tag <image_id> gcr.io/<project_id>/<repo_name>:<image_version>

Replace <image_id> with the ID from docker images.

Push

docker push gcr.io/<project_id>/<repo_name>:<image_version>

Make sure you’re authenticated (gcloud auth configure-docker) before pushing. That’s it! ***