Can I have more than one domain on the same Droplet?

Yes, you can point an unlimited number of domains to a single Droplet, and you can serve multiple websites from a single Droplet.

If you are using Apache to serve websites on your Droplet, you need to set up your Apache virtual hosts to host multiple websites.

If you are using nginx to serve websites on your Droplet, you need to set up nginx server blocks to host multiple websites.

You can typically install an SSL certificate by adding a few lines of configuration to the Droplet’s web server, or by using tools that automatically add the configuration for you.
You can disable the address on your Droplet from the command line or through updating your Droplet’s eth1 interface configuration.
Ensure your Droplet’s public and private network interfaces are correctly named eth0 and eth1.