Add main method

src/main/java/se/gerstner/notes/observer/Main.java

@@ -0,0 +1,13 @@
+package se.gerstner.notes.observer;
+
+import io.quarkus.runtime.annotations.QuarkusMain;
+import io.quarkus.runtime.Quarkus;
+
+@QuarkusMain  
+public class Main {
+
+    public static void main(String ... args) {
+        System.out.println("Running QuarkusMain method");
+        Quarkus.run(args); 
+    }
+}