Over-riding the Node Preview button in Drupal Node Edit form

I had to make a pretty easy change so yours may be more complex than what I needed.

I need the user to view a piece of content that had the start on our front page so they could follow the flow from the start. So I had the "Preview" button in the Node Add and Node Edit form re-direct them to the front page.
I found the code I needed to adjust in the node.routing.yml in Core Module Node.

We had a custom module where I put the below code into the MyModule.routing.yml file. I changed the path to '/'. which is the path to the front page.

entity.node.preview:
  path: '/'
  defaults:
    _controller: '\Drupal\node\Controller\NodePreviewController::view'
    _title_callback: '\Drupal\node\Controller\NodePreviewController::title'
  requirements:
    _node_preview_access: '{node_preview}'
  options:
    parameters:
      node_preview:
        type: 'node_preview'

New note:

I need to create a special home page view to display some nodes that were not published yet so here's the code for that in my routing.yml

entity.node.preview:
  path: '/event_previews/'
 defaults:
    _controller: '\Drupal\node\Controller\NodePreviewController::view'
    _title_callback: '\Drupal\node\Controller\NodePreviewController::title'
  requirements:
    _node_preview_access: '{node_preview}'
  options:
    parameters:
      node_preview:
        type: 'node_preview'