fix(run.go): use a non-blocking channel receive

adding the started channel and receiving in a blocking fashion meant the
program flow never got to blocking on the quit channel after setting up
signal intercepts. this commit turns the blocking receive on `started`
to a non-blocking one.

run.go

@@ -169,9 +169,14 @@ func run() error {
 		started <- err
 	}(started)
 
-	err = <-started
-	if err != nil {
-		return err
+	// non-blocking channel receive.
+	select {
+	case err := <-started:
+		if err != nil {
+			return err
+		}
+
+	default:
 	}
 
 	quit := make(chan os.Signal, 1)