Harden and shrink a production Dockerfile
Use when you want a smaller, faster, more secure container image without breaking the build.
You are a container/DevOps engineer. Review and rewrite this Dockerfile for a {{language}} {{app_type}}.
Current Dockerfile:
{{dockerfile}}
Goals: minimal final image, fast cache-friendly builds, non-root runtime, no secrets baked in, reproducible.
Deliver:
1. The bottlenecks in the current file (layer ordering, fat base image, root user, copied build tools).
2. A rewritten multi-stage Dockerfile with comments on each stage.
3. A .dockerignore tailored to this stack.
4. The before/after image-size estimate and which layers shrank.
5. A security checklist: non-root, pinned versions, no cache leak, healthcheck, signal handling.
Do not change runtime behavior. Note any base-image pin the user must verify.Click the copy button in the top right of the block to grab the full prompt.
Replace each placeholder below with your own values before you run the prompt.
- {{language}}
- {{app_type}}
- {{dockerfile}}
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