title: Microprofile misses manifest.mf
body: <p>I created an example microprofile app. And the readme says i can start it with java -jar myjar.jar</p>
  <p>But when I try it i get an error that no manifest.mf exists.</p>
  <p>I really don't have one in my example generated project. But when I extract the jar, there is one generated, but without a main class.</p>
  <p>How is a Microprofile app even supposed to run? I know there is a class extending Application. But how should I handle this manifest file?</p>