ENTRYPOINT instructions define what command gets executed when running a container. There are few rules that describe their co-operation.
- Dockerfile should specify at least one of
ENTRYPOINT should be defined when using the container as an executable.
CMD should be used as a way of defining default arguments for an
ENTRYPOINT command or for executing an ad-hoc command in a container.
CMD will be overridden when running the container with alternative argument