Please check out out project, Lite Engine[1], a Backend as a Service web application platform. We provide everything you need to rapidly prototype and deploy your single page applications: static file hosting for your html, css, javascript and other assets, a subdomain on our site, security with https, and a 'create your own API' with SQL over CORS and JSON. I think of this as "geocities with a CORS backend".
For your backend we've developed a system we call API Queries. You'll define SQL queries, save them on the backend, then execute them with http post requests that return JSON responses. There are obviously a lot of pros and cons to this 'stored procedure' approach. Please chime in with your thoughts below!
Right now we're offering free accounts while we gauge interest. We plan to offer custom domains with paid accounts. What this means is when you signup for a free account, you will get a 'myapp.lite-engine.com' domain, with a paid account, we'll host your 'www.myapp.com' site, secured with Let's Encrypt certs.
All feedback appreciated!
[1] https://www.lite-engine.com