fix config path

Program.cs

@@ -48,11 +48,11 @@ static Config LoadConfig()
         WriteIndented = true
     };
 
-    if (!File.Exists("config.json"))
+    if (!File.Exists("/config.json"))
     {
         Log.Fatal("No config file found, creating dummy config.");
         CreateConfig(serializationOptions);
-        System.Environment.Exit(1);
+        Environment.Exit(1);
     }
 
     var configFile = File.ReadAllText("config.json");