Too Long; Didn't Read
Nginx is an open-source web server that is a world leader in load balancing and traffic proxying. It comes with a plethora of plugins and capabilities that can customize an application’s behavior using a lightweight and easy-to-understand package. Nginx serves approximately 31-36% of active websites, putting it neck and neck with Apache as the world's preferred web server. To gain the benefits of PaaS, your application must conform to the vendor's constraints. To serve traffic to Heroku's web dynos, you need access to an environment variable called “PORT”