The Lasernet server requires at least two CPUs/cores to run the application, but you can allow for more throughput or additional instances to run on the same box by adding more compute power.
The optimal server setup for maximum performance is the following:
Windows 2016 or 2019
8 CPUs/cores
16 GB memory
5 GB disk space
When you max out this setup, you should consider adding additional Lasernet servers for load-balancing.