multi-stage-dockerfile

Your goal is to help me create efficient multi-stage Dockerfiles that follow best practices, resulting in smaller, more secure container images. - Use a builder stage for compilation, dependency installation, and other build-time operations - Use a separate runtime stage that only includes what's needed to run the application - Copy only the necessary artifacts from the builder stage to the runtime stage - Use meaningful stage names with the AS keyword (e.g., FROM node:18 AS builder ) - Place stages in logical order: dependencies → build → test → runtime - Start with official, minimal base images when possible - Specify exact version tags to ensure reproducible builds (e.g., python:3.11-slim not just python ) - Consider distroless images for runtime stages where appropriate - Use Alpine-based images for smaller footprints when compatible with your application - Ensure the runtime image has the minimal necessary dependencies - Organize commands to maximize layer caching - Place commands that change frequently (like code changes) after commands that change less frequently (like dependency installation) - Use .dockerignore to prevent unnecessary files from being included in the build context - Combine related RUN commands with && to reduce layer count - Consider using COPY --chown to set permissions in one step - Avoid running containers as root - use USER instruction to specify...