Add more features to the list

Some more that are either somewhat implied or not big items but should still be listed, maybe in a smaller below the main set. Maybe move this all to apex.sh/up

- revise the list in general
- Zero-downtime deployments
- Server restarts upon crash
- Pay only for what you use
- Ignore files
- Declarative TF style config planning / diffing following best practices
- Private endpoints
- Immutability of deploys / environment variables
- Error pages (404.html, 4xx.html, error.html)
- Implicit http -> https redirect
- local dev server
- list of middleware (CORS etc)
- google analytics / segment injection etc
- _headers support matching Netlify
- _redirects support matching Netlify
- path-based script/css injection rules
- over a dozen regions
- AWS itself is a feature (vs some sketchy startup)