Nginx is a high performant web server and load balancer, and is well suited to deploying high traffic websites. Even though this decision is opinionated, Python and Node developers usually use this.
Nginx can also act as an upstream proxy server that allows us to redirect the HTTP requests to multiple application servers running on the same server. The main contender of Nginx is Apache's httpd. Nginx is an excellent static file server that can be used by the web clients. Since we are dealing with APIs, we will look into aspects of dealing with HTTP requests.
On Ubuntu 16.04, use these commands to install Nginx:
sudo apt-get update
sudo apt-get install nginx
On macOS X, you can install it with brew:
brew install nginx
https://brew.sh/ is a very useful software packaging system for macOS X users. My recommendation is to use it...