css image center
.container {
position: relative;
float: right;
width: 100%;
height: 250px;
overflow: hidden;
}
.container img {
position: absolute;
top: 50%;
left: 50%;
width: auto;
min-width: 100%;
height: 100%;
/* height: auto; */
/* min-height: 100%; */
margin-right: -50%;
transform: translate(-50%, -50%);
object-fit: contain;
-o-object-fit: contain;
}