restore composer.json, add mysqli extension

database/migrations/2020_08_19_155058_create_carts_table.php

@@ -0,0 +1,38 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateCartsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('carts', function (Blueprint $table) {
+            $table->id();
+
+            $table->string('token')->nullable();
+            $table->unsignedBigInteger('user_id')->nullable();
+            $table->unsignedBigInteger('product_id');
+            $table->integer('count')->default(1);
+            $table->string('size')->nullable();
+
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('carts');
+    }
+}