How to test the application inside a docker container?

Question

Docker

How to raise and check for correct operation of the application inside the docker container

Answer 1

option 1 - watch the container logs
option 2 - connect to the container and look inside, as on a regular host - docker exec -it <conteiner_id> /bin/bash
the second option, of course, may not work, it depends on the container - is there bash inside or not, etc.

Answer 2

For more convenient viewing of logs and work in the console, I can advise https://www.portainer.io