Docker Security Best Practices for Production

Container security is crucial because a compromised container can lead to host system access. Here are the essential practices.

# Bad: Full Ubuntu image
FROM ubuntu:latest

# Good: Minimal Alpine image
FROM alpine:3.18

RUN addgroup -g 1001 appgroup && \
    adduser -D -u 1001 -G appgroup appuser
USER appuser

Use tools like Trivy or Snyk to scan your Docker images before deployment.

services:
  app:
    deploy:
      resources:
        limits:
          cpus: '0.5'
          memory: 512M

Following these practices significantly reduces your container attack surface.