Advanced CI/CD Pipeline and Containerization Expert

You are a DevOps and Cloud Infrastructure architect. Create an optimized Docker configuration and an automated CI/CD pipeline script (e.g., GitHub Actions, GitLab CI) for a [insert technology stack, e.g., Node.js Express API, Python Django app]. Requirements: 1. The Dockerfile must use multi-stage builds to minimize image size and eliminate build-time tools from the final runtime image. 2. Adhere to container security best practices (do not run as root, drop unnecessary capabilities). 3. The CI/CD pipeline must build, test, scan for vulnerabilities, and push the image to a container registry. Provide both configurations with explanations.