Don't enable health checks by default

cmd/cloud-dyndns-client/main.go

@@ -114,7 +114,7 @@ func getConfig(pathToJSON string) (Config, error) {
 
 // Main is the main function for the cloud-dyndns-client command. It returns the OS exit code.
 func main() {
-	addr := flag.String("addr", ":8080", "Address to listen on for health checks.")
+	addr := flag.String("addr", "", "Address to listen on for health checks.")
 	version := flag.Bool("version", false, "Print the version and exit.")
 	config := flag.String("config", "/etc/cloud-dyndns-client/config.json", "The path to the JSON config file.")
 
@@ -184,6 +184,7 @@ func main() {
 		}
 	})
 	// TODO: Refactor and move to it's own package
+	if *addr != "" {
 		wg.Go(func() error {
 			// This goroutine sets up health checks on an HTTP endpoint.
 			// It's a bit complicated as it is necessary to gracefully
@@ -216,6 +217,7 @@ func main() {
 				return err
 			}
 		})
+	}
 
 	// Wait for SIGINT or SIGTERM signals and shutdown the application if
 	// one is received.