no css source map

[yangweijie]

I'm submitting a...

no viewer.min.css.map file browser hint 404

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report 
[ ] Feature request
[ ] Documentation issue or request

Current behavior

Expected behavior

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Environment

Viewer version: X.Y.Z


Browser:
- [ ] Chrome (desktop) version XX
- [ ] Chrome (Android) version XX
- [ ] Chrome (iOS) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ ] Edge version XX

Others: