public function up(): void
    {
        Schema::create('employees', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('city');
            $table->double('salary')->nullable();
            $table->date('birth')->nullable();
            $table->integer('positionId')->unsigned()->nullable();
            $table->timestamps();
        });
    }