May I suggest updating your website though? its the main landing page and what converts visitors to users. Sex appeal of a website is a massive selling point, so might be worth spending some time spicing it up a little, maybe a clearer image of how your app works?
you probably are stacking up technical debt. However every project has some, it comes down to, weather or not you understand what you are doing. If something goes wrong, would you know where and how to fix it? if the answer is yes, then you are fine IMO, if you don't feel confident with what you have built technically, then it might be worth investing more time into some code harding. but my 5 cents is, vibe coding is meant to be fun, so have fun and learn :)