JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.4.1.slim.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.css">
<div class="conteiner">

<!-- Карточки новостей -->
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>

</div>

CSS

.conteiner {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
  border: 1px solid red;
}
.item {
  flex: 1 1 20%;
	min-width: 261px;
  height: 200px;
	padding: 0 10px 20px 10px;
  background-color: grey;
  border: 1px solid red;
  flex-grow: 0; /* <-----  Самая важна часть*/
  margin: 3px
}