RSS feed app would be a nice addition

Hi,

It would be nice if someone could build an app for pulling RSS feeds into Rocket. I know Zapier can do that but 15 minutes to wait is a bit tad much, even the paid version 5min is too much in some use cases.

It would be also good if the RSS feed was channel specific, meaning admins could add different feeds to different channels, if thats possible.

Thank you very much.