server {
    listen       ${APP_PORT};
    server_name  localhost;

    root  /usr/share/nginx/html;

    error_page  500 502 503 504  /50x.html;

    location / {
        root   ${APP_HOME};
        index  index.html;

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