porting from dev server to production server

(from github.com/markcamos)
We’ve been making changes to a development version of fess and would like to port these changes to a “production” version. What’s involved in duplicating what we’ve done in devel to production?

(from github.com/marevol)
Upgrade page provides information about config files.
For indices in elasticsearch, you can use snapshot/restore to copy them to a production server.