Drupal 8.x

I am searching for a way to display my articles on the frontpage as Bootstrap Thumbnails. Similar to the below: https://i.stack.imgur.com/4t4Us.png

In the D7 version it was available in the Views Bootstrap module, however its not included in the module for D8.

I was thinking about changing the Teaser style, but im not able to find how exactly this can be done.

Any help would be appreciated.

Thank you

Been hanging around here for years now using one form of drupal or another for sites I volunteer to setup for free, zip, no charge - mainly vet issue/oriented sites.  Resent(ly) started helping some of the true BAD ASSES from the Vietnam War,  most SF who earned a Green Beret who volunteered to work with MACV-SOG (out side the wire - across the fence).  On Tilt's site, decided to see where drupal has gone.  So setup 8.  Not without minor issues ( that if I can't fix I don't want to use ).  The bad boy thats been biting my butt, despite my efforts with google and reading without end on the t

Today i tried to open my results tab on my webform and it gives me the white page with

The website encountered an unexpected error. Please try again later.

when i checked on my admin > reports it gives me php error :

Hi everyone!

Hello,

For each page in the site, we want to record all other pages that point to it (from the body text). In wikis, these are commonly called "backlinks".

For Drupal 5 there was a seperate module for this, for D6 and D7 (Views 2/3) this functionality was baked into Views Module, when "backlinks" view is activated, a "What links here"-tab appears in the desired content type. But in D8 we didn't found the backlinks view anywhere, is it removed? is there any way to create a list of backlinks in D8?

Are there any modules are processing to sum totals in a webform?  I need the form to perform simple calculations:

Adult Count ($90.00)     Adult Total ______

Adult Count_2__   x $90.00   Adult Total_$180____

Adult Count ($90.00)       Adult Total

2                                     $180.00

Child Count ($70.00)      Child Total

2                                    $140.00

Total Fees                     $320.00