Add migration for federation

database/migrations/2018_10_25_030944_update_profile_table.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class UpdateProfileTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('profiles', function (Blueprint $table) {
+            $table->string('key_id')->nullable()->unique()->index()->after('outbox_url');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('profiles', function (Blueprint $table) {
+            $table->dropColumn('key_id');
+        });
+    }
+}