docs: add self-hosting section (#883)

kon-foo

2024-02-19 3e09b05468c372e85518ff76d8d6d9a415f61fac

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export const escapeHTML = (unsafe: string) => {
  return unsafe
    .replaceAll("&", "&")
    .replaceAll("<", "&lt;")
    .replaceAll(">", "&gt;")
    .replaceAll('"', "&quot;")
    .replaceAll("'", "&#039;")
}