First of all we need Murmur in our server.
Open the murmur.ini configuration file and edit it so murmur can be run by the 'murmur' user created by the package.
Now give permissions to the murmur database, so the user 'murmur' can read it.
Setting up SSL certificates
If you already have used Certbot to set up certificates in your web server, then you can easily make a new certificate for a subdomain 'mumble' and add the cert paths to the mumble.ini configuration file. You can use vim and edit the file manually.
It should look something like this.
Starting up the service
Start the murmur service.
You can add the murmur service to the default runlevel.
In case you don't want murmur to be default on runlevel, rollback with this command