SvelteKit + Supabase to do it quick and dirty. Since I am not the best programmer out there (my day to day job is product owner), it allows me to actually finish my projects and validate them with the market within days instead of months.
I can totally see how a senior fullstack dev would have a completely different approach though.
Looks amazing, good job man :) I'm actually way more motivated by seeing a post like this where you specifically say it took effort and time to build something meaningful, than seeing "10k$ MRR in a week, no-code" crap that we get bombarded with lately. Keep up the good work!
May I ask you how did you find the process of programming a Shopify app using Svelte? I have some experience with Svelte and am currently in process of starting development of a new Shopify app, but I basically decided to go with React as they have a lot of documentation and libraries (Polaris, AppBridge) available for it, while on Svelte I would have to do everything from scratch (or at least that's how I understood it from their docs)
EDIT: after reading your comment one more time, I assume you've used Svelte only for a small part of the app, not the app as a whole?
We are using next.js for the admin interface of the app. Works great with Polaris and AppBridge. Svelte is only used for the widget we are providing to the merchants.
I can totally see how a senior fullstack dev would have a completely different approach though.