server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index all-steps.html;
    
    location / {
        try_files $uri $uri/ =404;
        add_header Access-Control-Allow-Origin *;
    }
    
    location ~ \.html$ {
        default_type text/html;
        add_header Access-Control-Allow-Origin *;
    }
}