Prompt · Developer Tools

Dockerfile Reviewer

Reviews a Dockerfile for size, security, and build-cache efficiency.

Have ready: Paste your Dockerfile

Fill in · 3 fields

PASTE THE DOCKERFILEWHAT IT RUNS, LANGUAGE, FRAMEWORKKUBERNETES / ECS / FLY / VPS / ETC.

Your prompt

Review this Dockerfile like a production SRE would.

Dockerfile:
[PASTE THE DOCKERFILE]
App: [WHAT IT RUNS, LANGUAGE, FRAMEWORK]
Deploys to: [KUBERNETES / ECS / FLY / VPS / ETC.]

Check:
1. Base image choice: is it minimal, pinned by digest, and appropriate?
2. Layer ordering for build-cache efficiency, what is busting the cache unnecessarily.
3. Security: running as root? secrets in layers? unnecessary packages/shells? Show the non-root user setup.
4. Multi-stage build: is the final image shipping build tools and source it doesn't need?
5. Healthcheck, signal handling (exec form CMD), and .dockerignore coverage.

Deliver the rewritten Dockerfile incorporating your fixes, with a comment on each changed line explaining why. Then give me the expected image-size reduction (rough is fine) and how to verify it.

Paste it into Muse or any assistant. Blank fields stay as [brackets].

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