Given that Docker is installed on the host machine, to run NoMachine server inside Docker it's enough to build an image from the Dockerfile and launch it.

Practical examples to run a NoMachine server with Docker, that can be easily applied to other server types, are available here:

for NoMachine v. 6
https://www.nomachine.com/DT10O00161

for NoMachine v. 5
https://www.nomachine.com/DT08M00100

for NoMachine v. 4
https://www.nomachine.com/DT08M00099