Let's set the standard settings by executing the following commands:

//create health check for http (80/tcp) for "/"
$ gcloud compute health-checks create http my-http-health-check --check-interval 5 --healthy-threshold 2 --unhealthy-threshold 3 --timeout 5 --port 80 --request-path /

//create health check for Tomcat (8080/tcp) for "/examples/"
$ gcloud compute health-checks create http my-tomcat-health-check --check-interval 5 --healthy-threshold 2 --unhealthy-threshold 3 --timeout 5 --port 8080 --request-path /examples/