kill.sh curl request get var doesn't match req.query.op values.

kill.sh contents:
#!/bin/bash
source /usr/local/etc/ocp4.config
APP_URL=probes-${RHT_OCP4_DEV_USER}-probes.${RHT_OCP4_WILDCARD_DOMAN}
curl http://$APP_URL/flip?op=kill

But apps.js contents:
// This route handles switching the state of the app
route.route('/flip').get(function (req, res) {
var flag = req.query.op;
if (flag === 'kill-health') {
console.log('Received kill request for health probe.');
healthy = false;
res.send('Switched app state to unhealthy...\n');
} else if (flag === "awaken-health") {
console.log('Received awaken request for health probe.');
healthy = true;
res.send('Switched app state to healthy...\n');
} else if (flag === 'kill-ready') {
console.log('Received kill request for readiness probe.');
ready = false;
res.send('Switched app state to not ready...\n');
} else if (flag === 'awaken-ready') {
console.log('Received awaken request for readiness probe.');
ready = true;
res.send('Switched app state to ready...\n');
} else {
res.send('Error! unknown flag...\n');
}
});

there is no value for op=kill

Compare the request in kill.sh with the supported req.query.op values in apps.js, starting at the /flip route. Align the curl request with the intended supported kill operation, then verify that the endpoint no longer reports an unknown flag.