I host my side project / "e-commerce" business on a tiny $3/year VPS (found using lowendbox), it only receives bytes (119 to be exact) from the mobile app each

I host my side project / "e-commerce" business on a tiny $3/year VPS (found using lowendbox), it only receives bytes (119 to be exact) from the mobile app each time it's used. Frontend is that handcrafted artisanal static HTML hosted on CloudFlare Pages, and simple button for checkout to Shopify/Stripe/whatever. The damn licensing for publishing my iOS app costs more than my entire infrastructure. Stay lean! Honestly, I should simply move to "serverless" ala AWS Lambda, but probably won't until (if) things go gangbusters.