config.php

<?php
/*
 * size: tiny, small, full
 *
 *        tiny: 21KB (Markup, HTML, XML, SVG, MathML, SSML, Atom, RSS, CSS, C-like, JavaScript)
 *
 *        small: 106KB (markup, css, clike, javascript, apacheconf, arduino, bash, basic, batch, 
 *                    bbcode, c, cpp, cmake, csv, diff, docker, git, go, http, ini, java, json,
 *                    log, makefile, markdown, markup-templating, nginx, pascal, perl, php,
 *                    powershell, python, ruby, shell-session, sql, typescript, vbnet,
 *                    visual-basic, wiki, yaml)
 *
 *        full: 567KB (see https://prismjs.com/index.html#supported-languages for list of supported languages)
 *
 * theme: coy, dark, default, funky, okaidia, solarizedlight, tomorrow, twilight
 * 
 * line-numbers: 'true' or 'false' (Do show line numbers or not)
 *       
 */

return [
        // change here
        'size' => 'small',
        'theme' => 'okaidia',
        'line-numbers' => 'true',
]
?>