Fix for #32

- Add the response check when updating client info

Client/controllers/clientController.js

@@ -137,6 +137,16 @@ exports.checkIn = async () => {
             reqOptions = new requestOptions("/nodes/nodeCheckIn", "POST");
             sendHttpRequest(reqOptions, JSON.stringify(runningClientConfig), (responseObject) => {
                 log.DEBUG("Check In Respose: ", responseObject);
+                // Check if the server responded
+                if (!responseObject) {
+                    log.WARN("Server did not respond to checkIn. Will wait 60 seconds then try again");
+                    setTimeout(() => {
+                        // Run itself again to see if the server is up now
+                        this.checkIn();
+                    }, 60000);
+                    return
+                }
+                
                 if (responseObject.statusCode === 202) {
                     log.DEBUG("Updated keys: ", responseObject.body.updatedKeys)
                     // Server accepted an update