support '0' as an IntSetting value

src/utils/__init__.py

@@ -298,6 +298,9 @@ class BoolSetting(Setting):
 class IntSetting(Setting):
     example = "10"
     def parse(self, value: str) -> typing.Any:
+        if value == "0":
+            return 0
+        else:
             stripped = value.lstrip("0")
             if stripped.isdigit():
                 return int(stripped)