Error: One application instance is already running. How to organize parallel work of applications?

Question

System administration

Actually, the question posed can be solved by launching virtual machines, each of which runs one instance of the application. This is a very resource intensive solution. We need something more lightweight, that is, running with the minimum environment required for the software.
Tell me which way to dig. Docker? Or is it not from that area at all?

Answer 1

If we discuss this problem in the abstract, then Docker is quite suitable for these purposes. Overhead is very small.
Or rewrite / design the application with the ability to run multiple copies with different environments.

Answer 2

Everything related to containerization.