If you're not a designer or trying to get a design job, it doesn't have to be super nice. You can just use any random template you like, or a generic Wordpress site. I doubt it'll matter. I think there are also nocode portfolio sites, or just a generic WYSIWYG like Wix or SquareSpace.

Provide links to your Github, project descriptions and screenshots if you can, code snippets, open source projects, whatever...

But hell, I'm a frontend dev with a little bit of design/graphics/UX experience and I still just send unformatted PDFs full of crap and don't have any personal website. I've never seen another dev with a portfolio. If you can build anything, even just a standard Tailwind/Bootstrap lookalike, you're fine.

Part of the reason I don't want to put up such a site is that the technologies involved change so fast, and are often so controversial, that it would take way too much upkeep. I don't want some employer to dig into the source and argue with me about why I chose this bundler or that framework or this CSS ... usually those choices are team/project-specific anyway and not up to me. By choosing one or another for my personal site, it makes it seem like I have a preference, when that's not necessarily the case.

This is a good cheap book for some basic guidelines if you really want to try to DIY something as opposed to using an existing template: https://www.refactoringui.com/