Lab 6 - Containers: Dockerize QuickNotes

[giselesikeh]

Goal

Complete Lab 6 by Dockerizing QuickNotes with a multi-stage image, Compose workflow, persistent volume, healthcheck, and security hardening.

Changes

• Added app/Dockerfile with a multi-stage Go build.
• Added a static healthcheck binary under app/cmd/healthcheck.
• Added root-level compose.yaml for QuickNotes.
• Added submissions/lab6.md with build evidence, image size, runtime tests, persistence test, design answers, and bonus security verification.

Testing

Verified locally:

• Built quicknotes:lab6.
• Confirmed final image size is 22.8 MB, below the 25 MB limit.
• Confirmed the image runs as nonroot:nonroot.
• Confirmed /health and /notes work.
• Confirmed Docker Compose reports the service as healthy.
• Confirmed named volume persistence across docker compose down && docker compose up.
• Confirmed volume removal after docker compose down -v.
• Verified hardening settings with docker inspect.
• Ran Trivy scan and documented results.

Checklist

• One lab on one branch
• app/Dockerfile added
• compose.yaml added at repo root
• submissions/lab6.md added
• Commit is signed