fix(setup-universal): call app.use() instead app.get() for express-static

[ndrsg]

Should be app.use() instead of app.get().
Otherwise there are problems with resolving files in serve-static, because the path gets not stripped with app.get().
https://github.com/expressjs/serve-static

PR Checklist

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PR Type

What kind of change does this PR introduce?

[ x ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Other... Please describe:

What is the current behavior?

If a root-static path other than . is used, file resolving in express-static does not behave as expected (404)

Issue Number: N/A

What is the new behavior?

rootStaticPath behaves as expected and resolves relative to viewsPath.

Does this PR introduce a breaking change?

[ x ] Yes
[ ] No

Users that somehow worked-around the file resolving issue need to undo their workaround.

Other information

[tincho-despegar]

Hi! Any news about this PR? I really need this to be in a release. Can I be of any help?