.image-container {
  position: relative;
  overflow: hidden;
}

.zoom {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-repeat: no-repeat;
  display: none;
}

.image-container:hover .zoom {
  display: block;
  background-image: url('https://i.postimg.cc/9zrctvLj/640d368b.jpg');
  z-index: 1;
  opacity: 0.7;
}