In this article, we will find the differences between CMD and ENTRYPOINT in a Dockerfile?
The ENTRYPOINT specifies a command that will always be executed when the container starts. The CMD specifies arguments that will be fed to the ENTRYPOINT.
Both CMD and ENTRYPOINT instructions define what command gets executed when running a container. There are few rules that describe their co-operation.
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 arguments.