
Best practices for building optimized, secure, and reliable container images include using trusted base images, signing images, limiting layers, employing multi-stage builds, securing secrets, reducing attack surface, and using proper tagging strategies.


<div><p>This article provides best practices for building optimized, secure, and reliable container images for use with Amazon ECS, EKS, and ECR.</p><ul><li>Use trusted base images from official sources like Amazon ECR Public Gallery</li><li>Tag images explicitly with versions instead of using "latest" tag</li><li>Sign container images to verify authenticity and prevent unauthorized deployments</li><li>Limit layers and use multi-stage builds to reduce image size and complexity</li><li>Store secrets externally in AWS Secrets Manager, not in images</li><li>Use minimal base images like Distroless or scratch to reduce attack surface</li><li>Run containers as non-root users with least privilege access</li><li>Remove unnecessary packages and dependencies from final images</li><li>Use Amazon ECR for secure storage with immutable tags and vulnerability scanning</li></ul><p>Following these practices ensures container images are lightweight, secure, and maintainable across microservice deployments.</p></div>


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