nginx.conf

worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /tmp/nginx.pid;

events {
    worker_connections 2048;
    multi_accept on;
}

http {
    include mime.types;
    default_type application/octet-stream;

    sendfile on;
    tcp_nodelay on;
    tcp_nopush on;
    server_tokens off;

    open_file_cache max=200000 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 2;
    open_file_cache_errors off;

    server {
        listen 3000;
        root /usr/share/nginx/html;
        index index.html;

        client_max_body_size 35m;
        lingering_time 300s;
        lingering_timeout 60s;
        error_page 405 =200 $uri;
        access_log off;
        log_not_found off;
        gzip off;

        location / {
            add_header Access-Control-Allow-Origin * always;
            add_header Access-Control-Allow-Headers 'Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Mx-ReqToken,X-Requested-With' always;
            add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS' always;
            add_header Cache-Control 'no-store, no-cache, max-age=0, no-transform';

            if ($request_method = OPTIONS) {
                add_header Access-Control-Allow-Credentials true;
                add_header Access-Control-Allow-Headers 'Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Mx-ReqToken,X-Requested-With' always;
                add_header Access-Control-Allow-Origin $http_origin always;
                add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS' always;
                return 200;
            }
        }

        location /assets/ {
            expires 365d;
            add_header Cache-Control public;
            add_header Vary Accept-Encoding;

            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/javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml;
        }
    }
}