bootstrap thumbnail grid code example
Example 1: bootstrap Image thumbnails
In addition to our border-radius utilities, you can use
.img-thumbnail to give an image a rounded 1px border appearance.
<img src="..." alt="..." class="img-thumbnail">
Example 2: bootstrap card change image
.card-img-top {
width: 100%;
height: 15vw;
object-fit: cover;
}