JSFiddle - React, Tailwind, and code Playground

HTML

<section>
    <h3 id="portfolio">Portfolio</h3>
    <ul>
        <li> <img src="https://ununsplash.imgix.net/photo-1416339684178-3a239570f315?q=75&fm=jpg&s=c39d9a3bf66d6566b9608a9f1f3765af"></li>
        <li><img src="https://ununsplash.imgix.net/photo-1416339134316-0e91dc9ded92?q=75&fm=jpg&s=883a422e10fc4149893984019f63c818"></li>
        <li><img src="https://ununsplash.imgix.net/photo-1416339276121-ba1dfa199912?q=75&fm=jpg&s=9bf9f2ef5be5cb5eee5255e7765cb327"></li>
    </ul>
</section>

CSS

ul {
list-style:none;
}
li img {
    width:50%;
    height:50%;
}