Defines an express middleware to deactivate user agent cache of requests.

Cache-Control : no-cache to force caches to request the original server Cache-Control : no-store to force caches not to keep any copy of the response Cache-Control : must-revalidate to force caches to ask original server validation of a stale response Pragma : no-cache to be backward compatible with HTTP/1.0 caches Expires : 0 to mark all responses as staled