fix encoding, add response settings

example/config.json

@@ -5,6 +5,14 @@
       {
           "host":"127.0.0.1",
           "port":1965
+      },
+      "response":
+      {
+        "default":
+        {
+          "code":20,
+          "meta":"text/gemini; charset=utf-8;"
+        }
       }
   },
   "memcached":

src/server.php

@@ -176,11 +176,11 @@ $server->setHandler(
         $response = new \Yggverse\TitanII\Response();
 
         $response->setCode(
-            20
+            $config->gemini->response->default->code
         );
 
         $response->setMeta(
-            'text/gemini'
+            $config->gemini->response->default->meta
         );
 
         // Route begin