title: upload addon vaadin to repository maven.vaadin
body: <p>good day, I would like to load my addon vaadin in maven vaadin, I have already loaded it in the vaadin directory, but I do not know how to publish it in the maven vaadin repository. I thought that this process was done automatically when uploading it to the vaadin directory, but it is not like that.
  Currently, the plugin in the vaadin directory is seen in this way in the maven section:</p>
  
  <p><img src="https://i.stack.imgur.com/Evkc9.png" alt="missing maven"></p>