Basic Nginx configuration for serving multiple websites at different domains

nginx.conf

# `events` block is required so we add an empty one for validity
events {}

http {
  # Configuration block for weatherapp.com
  server {
    listen 80; # HTTP
    server_name weatherapp.com; # match all requests originating from "weatherapp.com" domain

    # Route all requests to port 3000 on localhost
    location / {
      proxy_pass http://localhost:3000;
    }
  }

  # Configuration block for ecommerceapp.com
  server {
    listen 80; # HTTP
    server_name ecommerceapp.com; # match all requests originating from "ecommerceapp.com" domain

    # Route all requests to port 3001 on localhost
    location / {
      proxy_pass http://localhost:3001;
    }
  }
}