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Dockerfile for Your App, Small and Secure

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The prompt

Act as a DevOps engineer. Write a production-ready Dockerfile for my app. My app: - Language and framework: [e.g. Node.js 22 with Express, Python 3.13 with FastAPI, Go, Java Spring] - How it's built and started: [COMMANDS] - Dependency files: [e.g. package.json and package-lock.json, requirements.txt, go.mod] - Port: [PORT] - Environment variables it needs (names only, no values): [LIST] - Static files or build output folders: [DETAILS] Give me: 1. A multi-stage Dockerfile: a build stage and a slim runtime stage, using official base images with pinned versions. 2. Layer order that caches dependencies well. 3. A non-root user, a HEALTHCHECK if the app has a health endpoint, and only the needed files copied. 4. A .dockerignore file. 5. Build and run commands, and how to pass environment variables at runtime. 6. A short explanation of each choice. Rules: never put secrets or real values in the Dockerfile; if you're unsure of a version tag, say so and mark it [VERIFY].

Why this prompt

• Hand-picked, editorially reviewed prompt
• Written for Claude, ChatGPT, Gemini

Source

Created by BestPromptFinder — editorial prompt, not user-generated. See our content & source policy.

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