nginx.conf

user  nginx;
worker_processes auto;

# number of file descriptors used for nginx
# the limit for the maximum FDs on the server is usually set by the OS.
# if you don't set FD's then OS settings will be used which is by default 2000
worker_rlimit_nofile 100000;

error_log /dev/stdout info;
pid /tmp/nginx.pid;

events {
    # TODO: check values
    worker_connections  4000;
    use epoll;
    multi_accept on;
}

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

    log_format  json  '{"remote_addr":"$remote_addr", "remote_user":"$remote_user", "time_local":"$time_local", "request":"$request", '
                      '"status":"$status", "body_bytes_sent":"$body_bytes_sent", "http_referer":"$http_referer", '
                      '"http_user_agent":"$http_user_agent", "http_x_forwarded_for":"$http_x_forwarded_for"}';  # -- POST body: $request_body
    access_log /dev/stdout json;
    error_log /dev/stdout error;

    # cache informations about FDs, frequently accessed files
    # can boost performance, but you need to test those values
    open_file_cache max=200000 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 2;
    open_file_cache_errors on;

    send_timeout 2;
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    reset_timedout_connection on;
    keepalive_timeout 30;
    keepalive_requests 100;
    client_max_body_size 100m;
    client_body_timeout 120;

    gzip on;
    # gzip_static on;
    gzip_min_length 10240;
    gzip_comp_level 6;
    gzip_vary on;
    gzip_disable msie6;
    gzip_proxied expired no-cache no-store private auth;
    gzip_types
        # text/html is always compressed by HttpGzipModule
        text/css
        text/javascript
        text/xml
        text/plain
        text/x-component
        application/javascript
        application/x-javascript
        application/json
        application/xml
        application/rss+xml
        application/atom+xml
        font/truetype
        font/opentype
        application/vnd.ms-fontobject
        image/svg+xml;

    client_body_temp_path /tmp/client_temp;
    proxy_temp_path       /tmp/proxy_temp_path;
    fastcgi_temp_path     /tmp/fastcgi_temp;
    uwsgi_temp_path       /tmp/uwsgi_temp;
    scgi_temp_path        /tmp/scgi_temp;

    server {
        listen 8000;
        server_name 0.0.0.0;

        # ssl_certificate $web_root/ssl/cert.crt;
        # ssl_certificate_key $web_root/ssl/private.key;
        # ssl_ciphers ECDH+AESGCM:ECDH+AES256:ECDH+AES128:DH+3DES:!ADH:!AECDH:!MD5;

        root /srv/www;
        index index.html;

        location / {
            # First attempt to serve request as file, then
            # as directory, then fall back to redirecting to index.html
            add_header Cache-Control no-cache;
            expires 0;
            try_files $uri $uri/ /index.html;
        }

        # Media: images, icons, video, audio, HTC
        location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|mp3|ogg|ogv|webm|htc)$ {
          expires 1M;
          access_log off;
          add_header Cache-Control "public";
        }

        # Javascript and CSS files
        location ~* \.(?:css|js)$ {
            try_files $uri =404;
            expires 1y;
            access_log off;
            add_header Cache-Control "public";
        }

        # Any route containing a file extension (e.g. /devicesfile.js)
        location ~ ^.+\..+$ {
            try_files $uri =404;
        }
    }
}