Leverage the browser cache and compress to speed up the file transfer.
In RHEL based image, the expire and deflate module are enabled in
default. In the Debian based image, only the deflate is enabled
* Enable expire module on the Debian based image
* Enable the expire for the assets resource
* Enable the deflate for the http response
Closes-Bug: #1605907
Change-Id: If25decc38a10a21929f72a89cdb350d4ac64a5a9