To install the UnitTestBot C/C++ server, you need Ubuntu 18.04–20.04.

If you have Ubuntu 18.04–20.04, you can install the UnitTestBot C/C++ server right on your OS.

If you want to use Docker with your Ubuntu 18.04–20.04, or you have some other Linux distribution or macOS:

1. Set up Docker and run a container with Ubuntu 18.04
2. Install the required dependencies and the compiler
3. Install the UnitTestBot C/C++ server

Having installed the server, proceed to installing the client.