Some updates

lib/helpers/providers/common.dart

@@ -0,0 +1,4 @@
+abstract class Provider {
+  String getServerType(String serverType);
+  String rawServerType(String serverType);
+}

lib/helpers/providers/hetzner.dart

@@ -0,0 +1,26 @@
+import 'package:softplayer_web/helpers/providers/common.dart';
+
+class Hetzner implements Provider {
+  @override
+  String getServerType(String serverType) {
+    switch (serverType) {
+      case "SERVER_TYPE_STARTER":
+        return "starter";
+      case "SERVER_TYPE_S":
+        return "starter";
+      case "SERVER_TYPE_STARTER":
+        return "starter";
+      case "SERVER_TYPE_STARTER":
+        return "starter";
+
+      default:
+    }
+    throw UnimplementedError();
+  }
+
+  @override
+  String rawServerType(string) {
+    // TODO: implement rawServerType
+    throw UnimplementedError();
+  }
+}