Best PracticesPin versions: Always use specific image tags, never :latestMinimize layers: Combine RUN commands with && to reduce image sizeUse .dockerignore: Exclude unnecessary files from build contextMulti-stage builds: Use multiple FROM statements to reduce final image size
Security TipsNon-root user: Always run containers as non-root usersNo secrets: Never hardcode secrets in Dockerfiles or imagesMinimal base images: Use alpine or distroless for smaller attack surfaceScan images: Regularly scan images for vulnerabilities with tools like Trivy