nginx.conf

worker_processes      2;
error_log             ./nginx.error.log;
worker_rlimit_nofile  8192;
pid                   nginx.pid;

events {
  worker_connections  1024;
  multi_accept        on;
}

http {

  access_log  off;
  charset UTF-8;

  types {
    text/html                             html htm shtml;
    text/css                              css;
    text/xml                              xml rss;
    image/gif                             gif;
    image/jpeg                            jpeg jpg;
    application/x-javascript              js;
    text/plain                            txt;
    image/png                             png;
    image/svg+xml                         svg;
    image/x-icon                          ico;
    application/pdf                       pdf;
    text/cache-manifest                   appcache;
  }

  gzip on;
  gzip_vary on;
  gzip_proxied any;
  gzip_comp_level 6;
  gzip_buffers 16 8k;
  gzip_http_version 1.1;
  gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

  server {
    listen       3301;
    server_name  localhost;
    root   ./build/;
    index  index.html;

    location ~* \.(?:manifest|appcache|html?|xml|json|css|js|map|jpg|jpeg|gif|png|ico|svg|eot|ttf|woff|woff2)$ {
            expires -1;
            add_header Access-Control-Allow-Origin *;
            add_header Access-Control-Allow-Credentials true;
            add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
            add_header Access-Control-Allow-Headers 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
            access_log  off;
    }

    location / {
      try_files $uri $uri/ /index.html =404;
    }
  }
}