Application Hickory Dickory Docker!
summary
Claim: any legacy app can be containerized. Demo shows an API built as a Tomcat WAR (requires Tomcat 7) wrapped on Alpine base + Tomcat 7 war, Dockerfile installs APK packages, COPY assets, CMD starts the app. Compose runs the API plus two MySQL containers with port mappings (3306 mapped to 8306 and 28406), networks and Docker DNS for service names. Tools: Docker Desktop, docker-compose, ctop, VS Code remote. Real bug encountered: runaway MySQL connections inside container fixed by in-container debugging.
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