fix: it's ok if you already exsist

cic/contract/components/attachment.py

@@ -45,7 +45,7 @@ class Attachment(Data):
     def start(self):
         """Initialize attachment settings from template."""
         super(Attachment, self).start()
-        os.makedirs(self.attachment_path)
+        os.makedirs(self.attachment_path, exist_ok=True)
 
     def get(self, k):
         """Get a single attachment by the sha256 hash of the content.