Removes BOSH trusted cert warning from Staticfile docs

[ryanmoran]

• adds overview header to Node.js docs

[cfdreddbot]

:white_check_mark: Hey ryanmoran! The commit authors and yourself have already signed the CLA.

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this. Unfortunately, the Pivotal Tracker project is private so you may be unable to view the contents of the story.

The labels on this github issue will be updated when the story is started.

[ljarzynski]

Thanks, @ryanmoran !