Simplified docker workflow test and modified API dockerfile dependencies

[MischaHeeb]

Description

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Chore (clean code, dependencies, ...)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Test this feature

1. Make sure act is installed on your computer
2. Run act pull_request -j docker-build
3. Pipeline should pass

Author Checklist:

• The code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Reviewer Checklist:

• The code follows the style guidelines of this project
• I have performed a self-review of my code
• The code has comments, particularly in hard-to-understand areas
• Corresponding changes were made to the documentation
• The changes generate no new warnings
• Tests were added that prove the fix is effective or that the feature works
• New and existing unit tests pass locally with the changes
• Any dependent changes have been merged and published in downstream modules