JSFiddle - React, Tailwind, and code Playground

HTML

<ol>
    <li>first</li>
    <li>second</li>
    <li>third</li>        
</ol>

CSS

ol {
    counter-reset: num -1;
}
ol li {
    list-style-type: none;
}
ol li:before {
    counter-increment: num;
    content: counter(num) ". ";
}