add api for harga emas and marhun

app/Http/Controllers/HargaEmasController.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\HargaEmas;
+use Illuminate\Http\Request;
+
+class HargaEmasController extends Controller
+{
+    public function showAllHargaEmas()
+    {
+        return response()->json(HargaEmas::all());
+    }
+
+    public function update($id, Request $request)
+    {
+        $harga_emas = HargaEmas::findOrFail($id);
+        $harga_emas->update($request->all());
+
+        return response()->json($harga_emas, 200);
+    }
+}