DATAGO-125081: Update readme for solace integration test support (#197)

Author: Nephery

README.md

@@ -48,6 +48,14 @@ The sample applications for all Solace Spring Boot projects can be found under [
 
 ## Building Locally
 
+### Prerequisites
+
+This project depends on `solace-integration-test-support-bom` which is published to GitHub Packages. You must configure Maven authentication before building.
+
+**See:** [solace-integration-test-support Maven configuration](https://github.com/SolaceDev/solace-integration-test-support#configuring-maven-to-pull-the-artifacts)
+
+### Running the Build
+
 To build the artifacts locally, simply clone this repository and run `mvn package` at the root of the project.
 This will build everything.