Support custom sync filter tag urls through env variables

[LZRS]

IMPORTANT: Where possible all PRs must be linked to a Github issue

Resolves #28

Engineer Checklist

• [ ] I have written Unit tests for any new feature(s) and edge cases for bug fixes
• [x] I have run mvn spotless:check to check my code follows the project's style guide
• [x] I have run mvn clean test jacoco:report to confirm the coverage report was generated at plugins/target/site/jacoco/index.html
• [x] I ran mvn clean package right before creating this pull request.

[dubdabasoduba]

@LZRS this would only work if the App also has these are configurable.