<div class="container">
  <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Ipsum, sint quos reiciendis inventore voluptate, placeat necessitatibus eum laudantium earum non, laboriosam modi enim illum fugit nobis asperiores minus doloremque et.</p>

  <p> <img src="https://fakeimg.pl/4000x2000/" width="4000" height="2000"></p>

  <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Doloribus consectetur quam magni, labore recusandae reiciendis cumque corporis sequi soluta tenetur amet quaerat sapiente sed. Error et delectus nostrum iure accusamus?</p>
</div>

.container {
	width: 400px;
	margin: 20px auto;
	border-radius: 15px;
	box-shadow: 0 0 30px -15px;
	padding: 15px;
}

img {
  max-width:100%;
  height:auto;
  
  outline: 1px solid red;
  background-color: blue;
}