buildkit

Registry build cache Persist full layer cache in a registry for CI; mode=max caches intermediate stages docker buildx build --cache-to type=registry,ref=<reg>/cache,mode=max --cache-from type=registry,ref=<reg>/cache -t <reg>/<name> --push . #buildkit#ci#performance#cloud Persistent cache mount in RUN Reuse package cache across builds without bloating layers; survives between runs RUN --mount=type=cache,target=/root/.cache/pip pip install -r requirements.txt #buildkit#performance#ci Secret mount during build Use a secret file in one RUN without baking it into any layer; pair with --secret RUN --mount=type=secret,id=npmrc,target=/root/.npmrc npm ci #buildkit#secrets#security SSH forward for private repos Forward host SSH agent into build to clone private git; key never enters the image docker buildx build --ssh default -t <name> . # Dockerfile: RUN --mount=type=ssh git clone git@host:repo #buildkit#secrets#security#network