JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <img src="https://cdn.mos.cms.futurecdn.net/paWPwF85Vkcs8YUuyvA3YM-650-80.jpg.webp">
    <div class="title">
        Planet Earth
    </div>
</div>

CSS

body {
    
    height: 100vh;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.container {
    
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
}

.container > img {
    
    flex-grow: 1;
    flex-shrink: 1;
    background-color: blue;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.container .title {
    
    padding: 10px;
    color: white;
    text-align: center;
    background-color: gray;
}