Transparent text over image in HTML CSS

<style>

.container {
  position: relative;
  max-width: 800px; /* Maximum width */
  margin: 0 auto; /* Center it */
  overflow: hidden;
}

.container .content {
  position: absolute; /* Position the background text */
  bottom: 0; /* At the bottom. Use top:0 to append it to the top */
  background: rgb(0, 0, 0); /* Fallback color */
  background: rgba(0, 0, 0, 0.5); /* Black background with 0.5 opacity */
  color: #f1f1f1; /* Grey text */
  width: 100%; /* Full width */
  padding: 20px; /* Some padding */
}

</style>

<div class="container">
  <img src="https://i.postimg.cc/vmVfNqFn/owner.png" alt="Notebook" style="width:100%;">
  <div class="content">
    <h1>Heading</h1>
    <p>Lorem ipsum..</p>
  </div>
</div>