Bootstrap Images
Overview
Bootstrap provides classes for styling images to make them responsive and add various effects.
Responsive Images
Images in Bootstrap are made responsive with .img-fluid. This applies max-width: 100%; and height: auto; to the image so that it scales with the parent element.
Image Thumbnails
Use .img-thumbnail to give an image a rounded 1px border appearance.
Aligning Images
Align images with the helper float classes or text alignment classes.