What kind of change does this PR introduce? (check at least one)
[ ] Bugfix
[ ] Feature
[ ] Code style
[x] Refactor
[x] Doc
[ ] Other, please describe:
The description of the PR:
Refactor Contribution Guidelines and unit tests.
Since Dynamic Datasource doesn't involve database-specific processing, I don't think we should use H2Database to emulate a database like MySQL. If we have this need in the future, I tend to use Testcontainer.
What kind of change does this PR introduce? (check at least one)
The description of the PR:
Other information: