html,
body {
  height: 100%;
  color: orange;
  background-color: black;
  margin: 0;
  font-family: 'Roboto', sans-serif;
}
.parent {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
img { 
  width: 100%;
  max-width: 400px;
}