To run CAT.NET within the context of a Build Server, you'll need to invoke it from a command line.
See the following instructions: * https://www.coveros.com/using-cat-net-security-scanner-on-your-net-web-application/
Before doing the following, it's important to recognize that CAT.NET is no longer maintained 1) – and was written for .NET applications, whereas current development should be targeting IT:AD:NET:Core.