Laravel and Dropzone in normal form

I cant get the image on dropzone getting null value when i die dump $files... sorry for my bad english thank you i hope someone help me :)

##Dropzone JS

     Dropzone.options.myDropzone = {
       autoProcessQueue: false,
       uploadMultiple: true,
       addRemoveLinks: true,
       maxFilesize: 7,
       maxFiles: 8,
       previewsContainer: '#dropzonePreview',
       clickable:'#myDropZone',
            init: function() {
                var myDropzone = this;
                this.element.querySelector("#submit").addEventListener("click", function(e) {
                    e.stopPropagation();
                    myDropzone.processQueue(); // this will submit your form to the specified action        path
                });
            }

        }

##View {!! Form::open(array('url'=>'client/addproduct','class'=>'dropzone','id'=>'myDropzone','enctype'=>'multipart/form-data')) !!} Product Name

                            <div class="form-group">
                                <label for="Product Price">Product Price</label>
                                <input type="text" class="form-control" id="price" name="price" placeholder="Regular Price" required maxlength="9" >
                                <p class="help-block">Note! no comma, no decimal places and not starts from 0, example: 5000 </p>
                            </div>
                            <div class="form-group">
                                <input type="text" class="form-control" id="price_sale" value="0" name="price_sale" placeholder="Sale Price" required maxlength="9">
                            </div>
                            <div class="form-group">
                                <label for="description">Description</label>
                                <textarea maxlength="600" class="form-control" type="textarea" id="description" name="description" placeholder="Description" rows="7"></textarea>
                                <span class="help-block"><p id="characterLeft" class="help-block">You have reached the limit</p></span>
                            </div>
                            <div class="form-group">
                                <label for="product-tag-select">Tags</label>
                                {!! Form::select('tags[]',$tags, null, ['id' => 'product-tag-select','class' => 'form-control', 'multiple', 'style' => 'width: 100%;']
                                   ) !!}
                                <p class="help-block">type to search keyword tags and press enter</p>
                            </div>
                            <div id="myDropZone">
                                <div class="dz-message" data-dz-message><span>To Upload Click or Drag and Drop Image here</span></div>
                                <div id="dropzonePreview">
                                </div>
                            </div>

                            <button type="submit" id="submit" name="submit" class="btn btn-success pull-right">Add Product</button>
                            {!! Form::close() !!}

##Controller

public function postAddproduct(Request $request)
{
        $price = str_replace(',', '', Input::get('price'));

        $this->validate($request, [
                'product_name' => 'required',
                $price => 'integer|min:2|greater_than:price_sale',
                'description' => 'required',
                'tags' => 'required',
        ]);
        $random_id = Uuid::generate(4);
        $slug = str_slug(Input::get('product_name'));
        $product = new Product;
        $product->id = $random_id;
        $product->slug = $slug;
        $product->product_name = Input::get('product_name');
        $product->category = "hello";
        $product->sub_category = "hello";
        $product->price = $price;
        $product->price_sale = 0;
        $product->description = Input::get('description');
        $product->username = Auth::user()->username;
        $product->save();
        $products = Product::Find($product->id);
        $products->tags()->attach(Input::get('tags'));
        $files = Input::file('file');
        dd($files);

        $uploadcount = 1;
        foreach ($files as $file) {
            $random = str_random(10);
            $product_image = new ProductImage;
            $filename = time() . '_' . $random . '.' . $file->getClientOriginalExtension();
            $path = public_path('img/products/' . $filename);
            Image::make($file->getRealPath())->resize(1200, 630)->save($path);
            $product_image->image = 'img/products/' . $filename;
            $product_image->product_id = $random_id;
            $product_image->sequence = $uploadcount;
            $uploadcount++;
            $product_image->save();
        }

        return redirect()->back()->with(['message' => 'Product has been successfully added', 'message_class' => 'alert alert-success fade in col-lg-offset-1']);


}