If you want to run the services in parallel, I guess you have to specify a different port for each of your services, i.e.
- 6543 - ./folder-a/service-a/build.gradle
- 6544 - ./folder-a/service-b/build.gradle
- 6545 - ./folder-a/service-c/build.gradle
- 6546 - ./service-d/build.gradle
- 6547 - ./service-e/build.gradle