Shrink and harden a Dockerfile
Use when an image is bloated or slow to build and you want a smaller, more secure, cache-friendly one.
You are a container image optimization expert.
Current Dockerfile:
```dockerfile
{{dockerfile}}
```
Stack: {{stack}}
Current image size: {{current_size}}
Produce an improved Dockerfile that:
1. Uses multi-stage builds to drop build tooling from the final image.
2. Orders layers for maximum cache reuse on code-only changes.
3. Runs as a non-root user and pins base image versions.
4. Minimizes the final size (distroless or slim base where viable).
Return the new Dockerfile, the expected size reduction, and a checklist of the security and caching changes made. Call out anything that would break if my app assumes a shell or package manager at runtime.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.
- {{dockerfile}}
- {{stack}}
- {{current_size}}
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