Можно ли запустить несколько процессов внутри контейнера Docker?

Yes, you can run multiple processes inside Docker container. This approach is discouraged for most use cases. For maximum efficiency and isolation, each container should address one specific area of concern. However, if you need to run multiple services within a single container, you can use tools like supervisor. Supervisor is a moderately heavy-weight approach that requires you to package supervisord and its configuration in your image (or base your image on one that includes supervisord), along with the different applications it manages. Then you start supervisord, which manages your processes for you. Example: Here is a Dockerfile using this approach, that assumes the pre-written supervisord.conf, my_first_process, and my_second_process files all exist in the same directory as your Dockerfile.

Итог

Key takeaway for interview: Is it possible to run multiple process inside Docker container?