update develop installation instructions

odoo_scripts/config.py

@@ -198,7 +198,9 @@ class Configuration:
             if toread(key):
                 setattr(self, key, value)
 
-        self.registry = section.get("registry", "registry.xcg.io")
+        self.registry = (
+            section.get("registry", "registry.xcg.io") if registry is None else registry
+        )
         project_path = os.path.realpath(".")
         self.image = section.get("image", os.path.basename(project_path))
         self.repository = f"{self.registry}/{self.image}"
@@ -273,4 +275,4 @@ def main(argv=None):
 if __name__ == "__main__":
     return_code = main(sys.argv[1:])
     if return_code:
-        exit(return_code)
+        sys.exit(return_code)