<div class="wrapper">
  <div class="header"></div>
  <div class="content">

  </div>
  <div class="footer"></div>
</div>

body {
  margin: 0;
}
.wrapper {
  height: 100vh;
  display: grid;
  grid-template-rows: 50px 1fr 50px;
}

.header {
  background: red;
}

.content {
  background: url(https://w.forfun.com/fetch/71/71f0c755f4b257fb9987c25743d16388.jpeg)
    center;
  background-size: cover;
}

.footer {
  background: green;
}