JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content">
            <h2>Portfolio</h2>
            <div class="img-block">
                <img src="img/01.png" alt="foto">
                <img src="img/02.png" alt="foto">
                <img src="img/03.png" alt="foto">
                <img src="img/04.png" alt="foto">
                <img src="img/05.png" alt="foto">
                <img src="img/06.png" alt="foto">
                <img src="img/07.png" alt="foto">
                <img src="img/08.png" alt="foto">
                <img src="img/09.png" alt="foto">
                <img src="img/10.png" alt="foto">
            </div>
        </div>

CSS

img {
    width: 100px;
    height: 100px;
    border: 1px solid red;
    margin-right: 15px;
}
img:nth-child(3n) {
    margin: 0;
}