Use related path in our docs for imgs, previous
can not use because website need the absolute path
from root directory, and after we merged
apache/dolphinscheduler-website#789 we have covert
function to do that

close: #9426

* [fix] Enhance name pre checker in resource center

Add file name and directory checker to avoid directory traversal

* add some missing change and change docs

* change var name in directoryTraversal

* Fix ci

Co-authored-by: NJiajie Zhong <zhongjiajie955@gmail.com>