Product Creation / Post Method incl. Picture?

Hello everybody, how are you?

So I am currently working on a Product setup for my Users. Therefore I would like to let them edit the product within one view, and upload content such as Title, Description and Price plus a Picture (or several pictures).

I've created an ProductUploadController:

public function postProductEdit(Request $request){
        
        $this->validate($request, [

            'title'=> 'max:140',
            'description'=> 'max:140',
            'price'=> 'max:140',
            'product_image'=> 'max:3000',

            
        ]);

        
        $update = Auth::user()->products()->create([
            'business_id' => auth()->user()->id,
            'title' => $request->title,
            'description' => $request->description,
            'price' => $request->price,
            'product_image' => $request->product_image,
            
        ]);

        if($request->hasFile('product_image')){

            $business = Auth::user();
            $image   = $request->file('product_image');         
            $filename = time() . '.' . $image->getClientOriginalExtension();            
            $location = public_path('uploads/business/products/'. $filename );          
            Image::make($image)->resize(812, null, function ($constraint){$constraint->aspectRatio();})->save($location);
            
            $business->product_image = $filename;
            $business->save();  
        


        return redirect()
            ->route('products.edit')
            ->with('info', 'Your product has been updated.');
}

So how am I able to integrate the Storeimage function within my Post Method correctly. By now it won't work with my Controller from the top.

Any suggestions? Thank you.