changed response encoding to text/plain

src/main/kotlin/de/dzptm/server/Extractor.kt

@@ -41,6 +41,7 @@ object Extractor {
                 "",
                 emptyList<Service>().toMutableList()
         )
+        res.type("text/plain; charset=utf-8")
         return Gson().toJson(output)
     }