bootstrap 4 image center align code example
Example 1: bootstrap 4 center image
/* used mx-auto d-block */
<img class="mx-auto d-block" src="https://www.w3schools.com/bootstrap4/paris.jpg" alt="https://www.w3schools.com/bootstrap4/paris.jpg"/>
Example 2: bootstrap class align center image
class="mx-auto d-block"
Example 3: bootstrap profile picture
<img src="..." alt="..." class="img-thumbnail">