Rclone md5sum monitoring webserver state

Just needed a quick/dirty way to monitor some tetchy public, and also login screen, web pages. As a temporary measure put a library of known good renders/doms in a folder on the cloud and scripted to grab current status using headless chrome, then compare md5 of them against the appropriate line returned by rclone md5sum on the known good directory. It didn't require retrieving the known good renders/doms to local, or chasing unobtainable/non-existent web-server logs.

A handy rclone command I had never thought would be of use directly.