Follow these steps to upgrade an existing Personal Server installation that was previously set up with the setup guide here.
Use the URL of the Ubuntu archive package, focalboard-server-linux-amd64.tar.gz, from the appropriate release in GitHub.
Create and use a clean directory, or delete any existing packages first, then run:
# Download the new version (e.g. 0.9.2 here, check the release for the latest one)
wget https://github.com/mattermost/focalboard/releases/download/v0.9.2/focalboard-server-linux-amd64.tar.gz
tar -xvzf focalboard-server-linux-amd64.tar.gz
# Stop the server
sudo systemctl stop focalboard.service
# Back up the old version
sudo mv /opt/focalboard /opt/focalboard-old
sudo mv focalboard /opt
# Copy config and move uploaded files over
sudo mv /opt/focalboard-old/files /opt/focalboard
sudo cp /opt/focalboard-old/config.json /opt/focalboard
# Start the server
sudo systemctl start focalboard.service
# (Optional) delete the backup after verifying
sudo rm -rf /opt/focalboard-old