What infrastructure is needed for Building a pipeline that dynamically generates and serves websites through nginx with subdomain and custom domain mapping.What is best practices and resource to learn about website provision.I have currenly researched on 
s3 with cloudfront 
pulumi code as infrastructure 
nginx with subdomainCurrenly i realised i dont have alot understanding of the domain to even ask the right questions. so in simple terms what would squarespace or usmo or webflow use to both manage and deploy and provision custom domaing for web editor to live.