Full Stack Development

I want my clients to more easily create marketing materials using Chat GPT. However they still don't know what prompts to use. So in order to make it easier for them, I need a system where I can supply the prompts, and they can just fill in their information to get the results. It consist of a frontend and backend: Frontend: - client can log in and use forgot password functionality - client can enter information about their business, product and target audience - they can can select to create a new project that consists of a number of templates (like selecting both "ads copy" and "landing page template copy"). Each template requires them to enter different inputs - each result is saved so they can access it afterwards. Backend - I can create new users (they should boy be able to sign up themselves) - I can create new (and manage) templates where I indicate the name, image and prompt (and I should be able to use the users standard information like target audience in the prompt - like "create an ad targeting [audience] for..." - see simpel stats on each user (how many conversions have they done and how many resources have they been using - I think it's called tokens, right?) Technology: it has to be something that can run on some standard shared hosting like Hostgator, so I'm thinking PHP. But if Hostgator supports it, I'm open to other solutions like Node.js etc. This is not some big web app. It's only got to support a handful of clients.