We set ours at the server-default level to globally set all of our Resin
processes to the same uid/gid, but you could just as easily move it down to the
server level so it applies only to a specific cluster/host.
Our config looks like this (which was taken from one of the example resin
You're running resin as root?? You should be slapped. Run as apache,
resin or nobody, never root.
To answer your question you could create a group called 'web' and add
your clients and resin to that group. Adjust umasks to create
directories as 775 and files as 664.
Alternatively run multiple