Add the thank you page where the user will be redirected to after placing an Magento order

[pkarw]

It's connected with DivanteLtd/magento2-external-checkout#7

We need to add route and Thank You Page; after this page is displayed, we must clear the shopping cart by dispatching:

  rootStore.dispatch('cart/clear', {}, { root: true })
  rootStore.dispatch('cart/serverCreate', { guestCart: false }, { root: true })

[filrak]

I'll take care of it. My proposal is that the route for the redirect after placing an order will be specified in config so user have full control over their route addresess. This would look like

externalCheckout: {
  ...
  "routeAfterPlaceOrder" : "thank-you-page" // or homepage if user prefers
}

We need changes in magento module for this. I suggest just redirecting it to /after-external-checkout-order route which will handle the rest

[pkarw]

Make sense. Remember to clear the cart before redirecting to thank you page