Nginx 下载文件，不显示内容

在我的网站上，我有一些验证文件需要放入没有扩展名的文档根目录中，只是“验证文件”，

但是当我尝试从浏览器打开它时，它会下载而不是打开，所有其他带有（.txt）扩展名的文件都可以正常打开，

我的 nginx (1.12) 配置：

server {
listen 80;
listen 443 ssl;

root /var/www/website;
error_log /var/log/nginx/website-error.log;
access_log /var/log/nginx/website-access.log;

index index.php index.html index.htm index.nginx-debian.html;

server_name website.com;
ssl_certificate /etc/ssl/website/nginx_bundle.crt;
ssl_certificate_key /etc/ssl/website/website.key;

location / {
    index index.php index.html;
    try_files $uri $uri/ =404 /index.php?q=$uri&$args;
}

# pass PHP scripts to FastCGI server
#
location ~ \.php$ {
    root /var/www/website;

    fastcgi_split_path_info ^(.+\.php)(.*)$;
    fastcgi_pass unix:/var/run/php/php5.6-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME /var/www/website/$fastcgi_script_name;
    fastcgi_param PATH_INFO $fastcgi_script_name;

}

# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
location ~ /\.ht {
    deny all;
}