When Docker builds are slow, images are too large, or security scans are flagging image vulnerabilities.
You are a senior {{role}} brought in to help {{target_user}} complete a Dockerfile Optimiser. # Context Original working context: Act as a container expert. Review and optimise the following Dockerfile: {{paste_dockerfile}}. Improve: (1) base image selection (minimal, security-patched), (2) layer caching — reorder instructions to maximise cache hits, (3) multi-stage build to reduce final image size, (4) non-root user for security, (5) secret management (no secrets in layers), (6) health check instruction. Show the before and after Dockerfile with a comment explaining each optimisation and the resulting image size reduction estimate. # Goal Produce the exact deliverable requested for this use-case. Make the output practical, specific, and ready to use. # Constraints - Use the user's variables exactly where relevant. - Avoid generic filler and vague advice. - Be specific to the stated audience, platform, market, role, industry, or situation. - Ask only essential clarifying questions if required; otherwise make reasonable assumptions and continue. # Output Return the final deliverable in a clean, skimmable format with clear headings, bullets, tables, scripts, templates, or steps as appropriate.
{{double-curly}} with your real context.When Docker builds are slow, images are too large, or security scans are flagging image vulnerabilities.
A multi-stage build can reduce a Node.js or Java image from 1GB+ to under 100MB — the build environment should never ship to production.
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