body {
  margin: 0;
}
.container {
  display: flex;
  height: 100vh;
  background-image: linear-gradient(
    360deg,
    rgba(0, 0, 0, 0.9),
    rgba(0, 0, 69, 0.9)
  );
  height: 100vh;
  justify-content: center;
  align-items: center;
  overflow: auto;
  
}

div > img {
  width: auto;
  height : auto;
  max-height: 95%;
  max-width: 95%;
  
}