Caddyfile

{
  admin off
  persist_config off

  log {
    level warn
  }
}

(must_headers) {
  header {
    Strict-Transport-Security "max-age=31536000; includesubdomains; preload"
    X-Content-Type-Options "nosniff"
    X-Frame-Options "SAMEORIGIN"
    Referrer-Policy "strict-origin-when-cross-origin"
    X-Xss-Protection "1; mode=block"
    Expect-CT "max-age=604800"
    -Server
  }
}

(proxy) {
  header_down X-Powered-By "European Geo Information"
  header_down Server "Caddy httpd"
}

(caching) {
  header {
    Cache-Control "public, max-age=604800, must-revalidate"
  }
}

:8080 {
  import must_headers
  import caching

  handle_path /tiles/dark-matter/* {
    reverse_proxy https://basemaps.cartocdn.com:443 {
      header_up Host {upstream_hostport}
      import proxy
    }
  }

  handle /* {
    root * /usr/share/html
    file_server

    # for spa
    try_files {path} /index.html

    templates index.html {
      between {$CADDY_TEMPLATE_ENCLOSED_BEGIN} {$CADDY_TEMPLATE_ENCLOSED_END}
    }

    encode zstd gzip
  }
}

:2019 {
  metrics /metrics
}