Jerome

nginx -t fails because of motive host not found in upstream "backend" in /etc/nginx/nginx.conf. am I missing something?

I ask, because I did do so, solved the issue at hand. But wonder whether if it's not best in environment.rb ?

This seems to be a nasty critter popping up in different places with different solutions. Example: http://stackoverflow.com/questions/17357014/imagemagick-mini-magick-tmp-files-error-ruby-on-rails/20933010#20933010
To further your suggestion, assuming one runs a localhost, then develops in development, runs development in production server because of acute development paranoia 8=\, would you suggest the same be added to development.rb ?