Returns a value configured via configuration on the classpath. This doesn't use any of the Spring Cloud Services.
mvn clean package && cf push
This will push the app as hello-service to the currently targeted space, using a random route
curl [the random route outputted by cf push]
You should see the value configured by hello.message in src/main/resources/application.yml. In order to change this value, you have to either have to edit the application.yml and redeploy (breaking the 12 Factor Config rule) or
cf set-env HELLO_MESSAGE "some other message"
which is not under version control or easily tracable.