Hotfix Inside a Running Container

Use docker exec to fix a live container without restarting it.

A beginner Docker challenge worth 3 points. Solve it hands-on in a real Docker environment in your browser - no local setup, no fake shells.

The Challenge

Scenario: A teammate flipped production to a maintenance page and left on vacation. The web container on port 8080 still serves "503 — DOWN FOR MAINTENANCE".

Check the browser panel: that's what users see right now. Save it as your "Before" snapshot.

Tasks:

• Get a shell (or run a command) inside the running container with docker exec
• Replace /usr/share/nginx/html/index.html so the page contains Welcome to ShellGenius
• No restart, no redeploy — fix it live, then refresh the browser panel

Commands to learn: docker exec -it, editing files inside containers

Run check when done.