slides/nginx.conf

server {
  listen 80;
  root /srv;

  access_log /dev/stdout;
  error_log /dev/stderr;

  keepalive_timeout 65;
  sendfile_max_chunk 1m;

  gzip_static off;
  gzip on;
  gzip_types *;

  # brotli
  brotli on;
  brotli_static on;

  # IP detection
  set_real_ip_from  0.0.0.0/0;
  real_ip_header X-Forwarded-For;

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

  # Show 403 as 404
  error_page 403 =404;

  # Kick malicious clients sooner
  client_header_timeout 10s;
  client_body_timeout 10s;
  client_max_body_size 128k;
  reset_timedout_connection on;

  location = / {
    return 302 https://theorangeone.net;
  }

  location ~ ^/([0-9a-z]+)/.* {
    # Custom 404 for each presentation
    error_page 403 404 =404 /$1/404.html;
  }

  # Inject plausible
  sub_filter "</body>" "<script defer data-domain='$host' src='https://elbisualp.theorangeone.net/js/script.js'></script></body>";
  sub_filter_once on;
  sub_filter_last_modified on;

  # Set sensible headers
  add_header X-Frame-Options "SAMEORIGIN" always;
  add_header Referrer-Policy "no-referrer-when-downgrade" always;
  add_header X-Content-Type-Options "nosniff" always;
  add_header Content-Security-Policy "upgrade-insecure-requests; block-all-mixed-content" always;

  # Expose WebDAV on a sub-path
  location /.dav/ {
    alias /srv/;

    auth_basic_user_file /etc/nginx/.htpasswd;
    auth_basic "Restricted";

    dav_methods PUT DELETE MKCOL COPY MOVE;
    dav_ext_methods PROPFIND OPTIONS;
    min_delete_depth 1;

    client_max_body_size 50m;
    client_body_temp_path /tmp;
    create_full_put_path  on;
  }

  # Healthcheck endpoint
  location /.ping {
    access_log off;
    return 200;
  }

  js_import slides.js;
  location = /sitemap.xml {
    js_content slides.sitemap;
  }
}