Nginx conf as reverse proxy for a nodejs app

nginx.conf

#Replace /usr/local/etc/nginx/nginx.conf with this. This is the
# default location for Nginx according to 'nginx -h'
worker_processes 1;
error_log /usr/local/var/log/nginx/error.log;

events {
  worker_connections  1024;
}

http {
  # This should be in the same directory as this conf
  # e.g. /usr/local/etc/nginx
  include       mime.types;
  default_type  application/octet-stream;
  
  # Note this log_format is named 'main', and is used with the access log below
  log_format   main '$remote_addr - $remote_user [$time_local]  $status '
    '"$request" $body_bytes_sent "$http_referer" '
    '"$http_user_agent" "$http_x_forwarded_for"';

  sendfile        on;
  keepalive_timeout  65;

  proxy_buffer_size   128k;
  proxy_buffers   4 256k;
  proxy_busy_buffers_size   256k;
  
  server {
      listen 80;
      server_name localhost;
      access_log /usr/local/var/log/nginx/nodeApp.access.log  main;
        
      gzip on;
      gzip_comp_level 6;
      gzip_vary on;
      gzip_min_length  1000;
      gzip_proxied any;
      gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
      gzip_buffers 16 8k;

      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-Proto $scheme; #http pr https
      proxy_set_header X-Real-IP $remote_addr;

      location / {
	      proxy_set_header X-Real-IP $remote_addr;
     	  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;
 	      root /path/of/your/project/build/;
        index index.html index.htm;
      }
      
      location /api {
         proxy_pass http://localhost:1337/api;
      }
     
      location ~* ^.+\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf)$ {
         root   /path/of/your/project/public/;
         expires 1M;
         access_log off;
         add_header Cache-Control "public";
      }
      
      location /build/ {
        alias /path/of/your/project/build/;
        expires 30d;
      }  
  }
}