fix: rethrow JSONDecodeError after printing the undecodable value as a warning

nyacme/handlers/cloudflare.py

@@ -23,7 +23,11 @@ class CloudflareHandler(Handler):
         env = os.environ.copy()
         env['CF_API_TOKEN'] = self.secret
         res = subprocess.run(['flarectl', '--json'] + args, check=True, stdout=subprocess.PIPE, env=env)
+        try:
             return json.loads(res.stdout)
+        except json.decoder.JSONDecodeError as ex:
+            self.log.warning('could not decode as JSON: %s', res.stdout)
+            raise ex
 
     def create(self, record_name: str, record_value: str) -> None:
         full_record_name = record_name + '.' + self.zone