Allow verification of the OS download via the website itself

### Expected behavior

I wonder if it would help more non-technical users to actually verify their downloads instead of skipping this step due to complexity (using terminal application).

There is a beautiful working example at the Tails project website.

https://tails.boum.org/install/linux/index.en.html
(see here step 3 "Verify your download")

### Actual behavior

At the moment, the installation guide still advises to check through the terminal.
look at https://elementary.io/docs/installation/#verify-your-download

Do you have any feelings and thoughts about this?