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+# Lab7 Experiment Record
+
+- Experiment: Containerization with Docker
+- Repository: https://github.com/whatokk/lab7-containerization-with-docker
+- Successful Actions run: https://github.com/whatokk/lab7-containerization-with-docker/actions/runs/27258893987
+- Docker image: cloud-lab-image:v1
+- Image size: 62.3MB
+- Main container: my-web-container, mapped host port 8080 to container port 80
+- Second container: second-container, mapped host port 8081 to container port 80
+- Port conflict: reproduced by trying to bind another container to host port 8080
+- Cleanup: docker ps returned no running containers after stopping/removing instances
+- Generated at: 2026-06-10 15:00:52 +08:00
+
+## Key Results
+
+The Nginx Alpine Docker image was built successfully. The web page was reachable through port 8080. After editing the source file, the running container did not change, proving image/container immutability. Container filesystem isolation was verified with docker exec. Runtime stats showed the web server using about 10.39MiB memory. Scaling to a second instance worked on port 8081, while reusing port 8080 caused the expected port allocation error.