Move developer setup in a dedicated method

Closes #117 (closed)

arkindex_worker/worker/__init__.py

@@ -68,6 +68,7 @@ class ElementsWorker(
 
     def __init__(self, description="Arkindex Elements Worker", support_cache=False):
         super().__init__(description, support_cache)
+
         # Add mandatory argument to process elements
         self.parser.add_argument(
             "--elements-list",