Why do I need Nginx with Puma?

Nginx is a web server and puma is an application server.
Both have their advantages, and you need both.

Some examples:

• Static redirects- you could setup your nginx to redirect all http traffic to the same url with https. This way such trivial requests will never hit your app server.

• Multipart upload- Nginx is better suited to handle multipart uploads. Nginx will combine all the requests and send it as a single file to puma.

• Serving static assets- It is recommended to serve static assets (those in /public/ endpoint in rails) via a webserver without loading your app server.

• There are some basic DDoS protections built-in in nginx.