<div class="img-edge-cover">  
  <img src="photo.png" alt="photo">
</div>

.img-edge-cover {
    width: 180px;
    height: 180px;
    position: relative;
}
.img-edge-cover:after {
    position: absolute;
    content: '';
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    box-shadow:0 0 50px 30px #ffffff inset;
}
.img-edge-cover img{
    width: 180px;
    height: 180px;
    display: block;
    margin-bottom: 20px;
}