user nginx;
worker_processes auto;

error_log /dev/null crit;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
}

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

    access_log off;

    sendfile on;
    tcp_nopush on;
    gzip on;
    server_tokens off;

    include /etc/nginx/conf.d/*.conf;

    keepalive_timeout 65;


    ### HTTP headers

    # TCP Keep-Alive
    add_header Connection "Keep-Alive" always;

    # CSP
    add_header Content-Security-Policy "default-src 'none'; child-src 'none'; script-src 'self'; style-src 'self' 'unsafe-inline'; form-action 'self'; font-src 'self'; frame-ancestors 'self'; base-uri 'self'; connect-src 'self'; img-src 'self'; manifest-src 'self'" always;

    # Enable cross-site filter (XSS) and tell browser to block detected attacks
    add_header X-XSS-Protection "1; mode=block" always;

    # Prevent some browsers from MIME-sniffing a response away from the declared Content-Type
    add_header X-Content-Type-Options "nosniff" always;

    # Disallow the site to be rendered within a frame (clickjacking protection)
    add_header X-Frame-Options "SAMEORIGIN" always;

    # Disable some features
    add_header Permissions-Policy "accelerometer=(),ambient-light-sensor=(),autoplay=(),camera=(),encrypted-media=(),focus-without-user-activation=(),geolocation=(),gyroscope=(),magnetometer=(),microphone=(),midi=(),payment=(),picture-in-picture=(),speaker=(),sync-xhr=(),usb=(),vr=(),interest-cohort=()" always;

    # Disable referrer
    add_header Referrer-Policy "no-referrer" always;

    # Cache control policy
    add_header Cache-Control "max-age=15552000" always;
}