Apply container image build practices that improve reproducibility, size, and runtime safety.
before-after stat-tile-trio stepper The app image is huge, non-reproducible, root-running, and full of development files. Make the image a minimal, reproducible runtime artifact The common trap is treating Docker as packaging convenience only. If the image carries dev tools, secrets, unpinned inputs, and root defaults, deployment inherits all of that risk. Before FROM node:latest, copy entire repo, install dev dependencies, run as root, no labels, 1.8 GB image. After Pinned base, lockfile install, multi-stage build, production-only runtime files, non-root user, commit labels, 310 MB image. Step 1 Pin the base image family and install dependencies from the lockfile in CI.…
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