Investigate in using code-triggered Docker integration tests instead of currently YAML-triggered

[stijnmoreels]

Is your feature request related to a problem? Please describe.
Currently, we use pure YAML code to spin up our Docker integration tests but these are only succeeding locally if you manually run the Docker container on your local machine (if you want to test locally, of course).

Describe the solution you'd like
We could consider using https://github.com/testcontainers/testcontainers-dotnet which helps us run a Docker container from code, which makes it easier to test Docker integration tests locally.