Improve printservant error handling

labelmaker/main.py

@@ -95,6 +95,9 @@ def stuff_print(size):
         headers={'Content-Type': 'image/png'},
     )
     print('Printing job response', response)
+
+    if response.status_code != 200:
+        return flask.Response(f"{response.text} ({response.status_code})", status=response.status_code)
     return 'ok'
 
 def main():