Run the docker compose script: compose.yml, but set the MYSQL_PASSWORD in the .env file to something else
If you want to restore a previous deployment, you could use one of the daily backups or you could manually run a backup yourself. Put the backed up database librenms.sql file in the db_image directory, and add the following line copy librenms.sql /docker-entrypoint-initdb.d/ to the Dockerfile inside that directory. Also in order to populate the graphs, you need to create a directory called librenms inside the compose directory and unzip the rrd.zip file there such chat inside the directory there is a folder named rrd and the folder contains folders named after the devices. Once you run docker compose, you will need to give the librenms_dispatcher container permissions to the rrd directory by running chown -R librenms:librenms /data/rrd/ inside the container.
The UI will run on port 8000
The backup script to backup the current installation on proxmox is hosted here: https://github.com/abacef/scn-librenms-backup-script
The upgrade script to upgrade the current installation on the proxmox based on this deploy script is hosted here: https://github.com/abacef/scn-librenms-backup-script