To complete your PaaS setup, you would need to add a CDN and DNS hosting to complete your setup. The company that can help you with CDN and to manage your DNS are CloudFlare.
CloudFlare is a service that does one thing: make websites better. With a single change to DNS, sites are instantly protected from a wide range of online threats, see an increase in page load speeds, and have their content dynamically optimized across the Internet.
The CLoudFlare CDN service will keep a copy of minimum content, so your website is available even when the server is down. It also claims to work with other CDNs to increase speed. Although it does not charge for bandwidth and its limited basic service is free, its paid plans run from $20 to $3,000 per month.