Your Dockerfile: - FROM ubuntu:latest - Installs 47 packages - Runs as root - 2.3GB image size - Rebuild takes 15 minutes - Security scan shows 89 vulnerabilities Your app: - A Python script - 3 dependencies - Could run on Alpine in a 50MB image You're not using containers. You're building VMs with Dockerfiles. This is what happens when people learn Docker from random Medium articles.