img {
display: block;
width: 60%; /* Or 600px instead of percentager value */
margin-left: auto;
margin-right: auto;
}
/* This method uses the margin property,
its typically used to center large images.
In this example the browser reads the image as a block element
(not an inline element) thus allowing the CSS margin property to work.
URL = https://blog.hubspot.com/website/center-an-image-in-html */