Description

• This changes the from lines of the two dockerfiles (src and test) so that depentabot can automatically detect updates to the base images again.
• At the same time, it adds the ability to search for updates of the base image for the docker image located in the test directory

Motivation and Context

Because otherwise the Docker base updates would be forget. For example, Alpine version 3.22 was released recently. According to the GitHub runner's log, dependabot always runs on Sundays, but it didn't recognize the base image tags and therefore can't searched for updates, for example, Alpine releases.

How Has This Been Tested?

I tested these changes in my fork and manually triggered dependabot and it recognized the updates for the base images after the change. (I just can't test it more precisely because certain github actions on my account aren't working properly at the moment)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.