79573df7cb
20 specialized agents, 10 skills, 17 slash commands, 6 plugins, 12 hooks with scripts, 8 rule sets, 3 CLAUDE.md templates, 14 MCP server configs, and interactive setup installer.
56 lines
2.0 KiB
Markdown
56 lines
2.0 KiB
Markdown
Generate an optimized Dockerfile for the current project.
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## Steps
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### 1. Detect Project Type
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- Read package.json, pyproject.toml, go.mod, Cargo.toml, or equivalent to determine the language and framework.
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- Identify the build command and output directory.
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- Identify runtime dependencies vs. build-only dependencies.
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### 2. Choose Base Image
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- **Node.js**: `node:22-alpine` for runtime, `node:22` for build if native modules are needed.
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- **Python**: `python:3.12-slim` for runtime, full image for build if compilation is needed.
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- **Go**: `golang:1.23-alpine` for build, `gcr.io/distroless/static-debian12` for runtime.
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- **Rust**: `rust:1.82-slim` for build, `debian:bookworm-slim` or `scratch` for runtime.
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### 3. Multi-Stage Build
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```dockerfile
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# Stage 1: Build
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FROM <build-image> AS builder
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WORKDIR /app
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COPY package*.json ./
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RUN npm ci --production=false
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COPY . .
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RUN npm run build
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# Stage 2: Runtime
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FROM <runtime-image>
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WORKDIR /app
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COPY --from=builder /app/dist ./dist
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COPY --from=builder /app/node_modules ./node_modules
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EXPOSE 3000
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USER node
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CMD ["node", "dist/index.js"]
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```
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### 4. Optimization Checklist
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- Copy dependency files first, then source code (layer caching).
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- Use `.dockerignore` to exclude: `.git`, `node_modules`, `dist`, `.env`, tests, docs.
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- Run as non-root user.
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- Set `NODE_ENV=production` or equivalent.
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- Add health check: `HEALTHCHECK CMD curl -f http://localhost:3000/health || exit 1`.
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- Pin base image versions with digest for reproducibility.
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- Minimize layers by combining related RUN commands.
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### 5. Generate .dockerignore
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Create or update `.dockerignore` with sensible defaults for the project type.
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## Rules
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- Always use multi-stage builds to minimize image size.
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- Never copy `.env` files or secrets into the image.
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- Run as a non-root user in the final stage.
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- Include a HEALTHCHECK instruction.
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- Keep the final image under 200MB for typical web applications.
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- Test the built image locally with `docker build -t app . && docker run -p 3000:3000 app`.
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