config : reraise exception instead of raising a new one

src/unisync/config.py

@@ -30,8 +30,8 @@ class ServerConfig:
         if self.ip != "":
             try:
                 ipaddress.ip_address(self.ip)
-            except ValueError:
+            except ValueError as e:
-                raise ValueError("The provided ip address is invalid")
+                raise ValueError("The provided ip address is invalid") from e
 
 @dataclass
 class RootsConfig: