This is a root issue for CI/CD, if you want to learn about the detail, you can track the email link https://lists.apache.org/thread.html/00dffebaf5f62672cc0d67ffc8317bb531f66f14dcb8decf913cbbb8%40%3Cdev.dolphinscheduler.apache.org%3E

So far, no one has objected to the UT coverage rate, so we will implement it according to the 60% UT coverage rate.
When pmc or committer merge pr, pay attention to the codecov comments. We must ensure that the UT coverage rate
of the submitted PR files reach 60%, and it is guaranteed that the UT coverage rate will only increase after the PR is merged.

And this is a root issue for track the ci/cd process.

I will break it into many scattered issues for everyone to contribute under the root issue:

• ut
• checkstyle check
• spotbugs check
• Front-end eslint check
• The CI / CD inspection and requirements are written into the code contribution document,
  the new PR code ut coverage is required to reach 60%, and the coverage can only be increased, not reduced.
• We use codecov tool to replace coveralls tool in fact, and this job is done.