Drupal 8.x

After you migrate content from an old site (currently the live site), images users, etc.. into a new Drupal site. And the new site is still being worked on by developers, it is not ready to go live yet. Editors are adding new content to the old live site. The question is do editors need to add new content to the old live site and the new Drupal site until the new site goes live?

After so much testing

I have decided to migrate my development from a virtual store from ubercart to Drupal commerce but I have a problem as

I can create a product catalog to display on the main page of the store. is there any module for it ???

On the product I created a "tags" taxonomy terms field. I have created a hundred "tags".

My products use around 10 "tags".

I created a pageview of my products with an exposed filter criterion "tags".

My problem :

The filter displayed on the product page displays all the terms. I only want to display the terms used by my products. How to do this ?

I am building a form that contains two image buttons and an undo button. The user clicks one of the two image button's and then the images are suppose to update to new images, and they do this about 60 times before we submit the results. The user can select the undo button to undo their last selection and select another one. This form is also displayed in a modal. However, I'm having some strange behavior with the images updating when you click the image...

Here's my routes file:

Hello, 

I am trying to create a testimonial block using the bootstrap theme. Is there any built-in bootstrap testimonial block that I can use including css/javadcript/jquery? I found some here and started working on it here but I do not see any css/jquery/js to it. I guess it requires lot of styling. 

Please advise