Show HN: Landing pages where you control the code

I somewhat regularly need to create landing pages or homepages and the typical flow for me is find a really great looking template, set of components or design somewhere that I want to use, then spend a bunch of time trying to figure out how to convert it into a CMS theme, give up on the design and sign up to a landing page platform to save time but not get the design I want, or code a small application using whatever my current web framework of choice is that just shows the pages and handles forms.

I've done the last one a bunch of times so when I needed to do it again I decided to generalise it out into an actual application. STL supports the standard landing page stuff, form submits, integrations, etc but it's a BYO design so if you like going the template route or you have design skills you'll get a better result.

This website is built in it so you can see an example of its output.