Digitalocean app email server configuration change


I just installed and started using the digitalocean 1-click install app. It works great! However, I now realized that I skipped the setup process too fast and did not include any email server information in case the users forget their passwords, etc. Can anyone guide me on how I can put this information into an already installed, already working version of the web interface? Thanks!

Gramps 5.2.2
Gramps Web API 2.3.0
Gramps Web Frontend 24.5.0
Gramps QL 0.3.0
locale: en
multi-tree: false
task queue: true