Hi Karsten, just finished throwing together a script that does seven of the eighteen DocTor checks. The rest shouldn't be hard, just take a little elbow grease...
https://gitweb.torproject.org/atagar/tor-utils.git/commitdiff/1e49c33
As for the website, why is that part of the same codebase as the monitors? The site doesn't look to make use of the derived warnings. Is this simply a kludge since they both make use of the same descriptor data?
The website might be a good use case for Hyde (http://ringce.com/hyde). That said, this feels like it should belong in the metrics-web repository...
Cheers! -Damian