worked on ResourceExtensionController.php and added resource_extension migration

skolehjem/database/migrations/2020_06_30_092130_create_resource_extensions.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateResourceExtensions extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('resource_extensions', function (Blueprint $table) {
+            $table->id();
+            $table->string("extension")->unique();
+            $table->text("description");
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('resource_extensions');
+    }
+}