domain: docs.docker.com · 7 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Confirm a Dockerfile exists in the build context (default file is PATH/Dockerfile).
Build and tag: `docker build -t myapp:latest .` (docker build / docker builder build / docker image build are aliases of docker buildx build, which uses BuildKit).
Use a specific Dockerfile: `docker build -f ./docker/prod.Dockerfile -t myapp:latest .`.
Skip the layer cache: `docker build --no-cache -t myapp:latest .`; set build args with `-t`-independent `--build-arg KEY=value`.
Target a specific stage in a multi-stage Dockerfile: `docker build --target runtime -t myapp:latest .`.
Quiet output prints only the image ID on success: `docker build -q -t myapp:latest .`.
Official docs: https://docs.docker.com/reference/cli/docker/build/
Known gotchas
Since Docker 23, `docker build` is the BuildKit-based buildx build; legacy `docker buildx` flags like --output and --platform apply.
The build context (everything sent to the builder) is the path passed at the end; keep secrets out of it — use `--secret id=...,src=...` instead of baking values into the image.
--build-arg values do NOT persist in the image (unlike ENV).
The build cache is keyed on layer inputs; changing files invalidates downstream layers. --cache-from/--cache-to are used to share cache in CI.
Use .dockerignore to exclude local junk (node_modules, .git, .venv) or builds will be slow and large.
For multi-arch or pushing use `--platform` and `--push` (buildx) rather than the legacy builder.
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