Add a section about updating base images regularly
A common use case is that there will be new versions of base images available in which case custom images based on these images need to be rebuilt by the maintainer regularly:
Another important best practice is to update your base images on a regular basis.
Once you chose a suitable base image and build your custom images it is recommended to update your base images regularly as soon as new version tags are released.
This mitigates the risk that known security holes and bugs are shipped with your custom images.
This is particularly made easy when having an automation strategy at hand that rebuilds your custom images as soon as new base images are released.