How to always use the newest version of a Docker Base Image?

Question

I have a DockerFile, for example, that contains the following line to pull the base image:

FROM myHub.com/base-image

I'm not specifying which tag to use. Now, let's say a newer image of base-image is pushed into the hub (version 2). If I run docker build again, docker figures out that my local system already has the base image pulled, so it uses the cache and keeps (version 1).

A quick fix is for me to specify the tag:

FROM myHub.com/base-image:2.0

But that doesn't seem very efficient. Because when a newer version is pushed again, I will have to manually change the tag in my dockerfile. Is there a better way to handle this? I'm new to Docker so there is quite a bit I'm unfamiliar with. Thanks

Answer 1

solution:

docker build --pull

explanation:

--pull Always attempt to pull a newer version of the image

https://docs.docker.com/engine/reference/commandline/build/