عرض عملي: تصحيح حاوية تتعطل

خطوة بخطوة

1. Start Shop; docker ps shows nothing, and docker ps -a shows Exited (1).
2. Read docker logs and find the connection error.
3. Use docker inspect to see the environment variables and spot the missing password.
4. Start a temporary container with docker run --rm -it --entrypoint sh shop:1.0 to look around.
5. Planned mistake: rebuild the image to change one env var; fix by passing -e at run time instead of rebuilding.
6. Run again, confirm health with curl, and record the cause in a note.