Dockerfile Generator

Why Multi-Stage Builds?

Multi-stage builds separate your build environment from your runtime environment. Build tools (compilers, dev dependencies) stay in early stages, while only the compiled artifacts move to the final stage. This reduces image size by up to 90% and improves security.

Security Checklist

• Non-root user: Limits damage from container breakouts
• Alpine/slim images: Fewer packages = smaller attack surface
• .dockerignore: Prevents secrets from being copied
• No hardcoded secrets: Use environment variables or secrets management
• Pin versions: Use specific tags, not latest

Layer Optimization

Order Dockerfile instructions from least to most frequently changed. Copy dependency files first, install them, then copy source code. This maximizes cache hits during rebuilds.