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Oleksandr Bezdieniezhnykh
16 lines
776 B
Plaintext
16 lines
776 B
Plaintext
---
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description: "Docker and Docker Compose conventions: multi-stage builds, security, image pinning, health checks"
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globs: ["**/Dockerfile*", "**/docker-compose*", "**/.dockerignore"]
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---
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# Docker
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- Use multi-stage builds to minimize image size
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- Pin base image versions (never use `:latest` in production)
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- Use `.dockerignore` to exclude build artifacts, `.git`, `node_modules`, etc.
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- Run as non-root user in production containers
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- Use `COPY` over `ADD`; order layers from least to most frequently changed
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- Use health checks in docker-compose and Dockerfiles
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- Use named volumes for persistent data; never store state in container filesystem
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- Centralize environment configuration; use `.env` files only for local dev
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- Keep services focused: one process per container
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