Ghost 4.0 just released today.
What is the recommended upgrade process for Ghost apps created with the one-click installer?
Note: I'm not expecting an immediate answer--the release is less than 24 hours old, after all--I just wanted to get the topic on the radar.
mwolfe02 SSH to your Ghost app's shell user and run the following commands:
npm update ghost-cli
../node_modules/.bin/ghost update v3
Be sure to back up your app and data first!
Finally got around to doing this today. Everything went smoothly. Thanks for the help, Sean!