Stripe & Analytics Website Upgrade

My site, https://www.promptflowing.com/, is already live on Render with Cloudflare in front and the codebase sitting on GitHub. I want to tidy up a few things so the platform is production-ready. The main objective is to add new functionality rather than redesign anything... (Budget: $30 - $250 USD, Jobs: Cloudflare, GitHub, Google Analytics, PHP, Stripe, Web Application, Web Development, Website Optimization)