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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
I would highly recommend DigitalOcean (https://www.digitalocean.com/) - they started with a simple VPS offering but have expanded over time. I've been using them since 2015 and they are highly reliable, communicative about any maintenance requiring downtime and transparent about pricing.
Feel free to check them out. If you want I can send you my referral link
I use Cloudflare Serverless for front end apps and Render for backend services.
- Cloudflare [1] scales easily and has a lot of easy to use services like databases and storage buckets, JAM Stack front end pages, and CDN services for images and videos.
- Render [2] has been great for us to spin up Python services quickly. I haven't worked with a production load on Render, but I hear good things :)
[1] https://www.cloudflare.com/developer-platform/products/
[2] https://render.com/