java-action-archetype/src/main/resources/META-INF/maven/archetype.xml

<archetype>
  <id>java-action-archetype</id>
  <sources>
    <source>src/main/java/FunctionApp.java</source>
  </sources>
  <testSources>
    <source>src/test/java/FunctionAppTest.java</source>
  </testSources>
</archetype>