using postiongs make center code example
Example 1: center image with position absolute
.wrapper img {
left: 50%;
transform: translate(-50%,0);
position: absolute;
z-index: 1
}
Example 2: how to center in absolute position
position: absolute;
margin-left: auto;
margin-right: auto;
left: 0;
right: 0;
text-align: center;