I've been using DocPad for a while now and just upgraded to version 6.55.5 and I now have a new file .docpad.db. I can't seem to find any information about this online.
Should I commit this into source control or ignore it?
It is a new file that is automatically generated to serve as a cache for the DocPad database. Unfortunatelly, git doesn't automatically ignore all dot files.
It is perfectly safe to put it in your gitignore file, and considering it is a cache file, it is probably recommended.