PrivateBin/PrivateBin — reverse-engineered prompt

Build me a minimalist self hosted paste sharing app like a privacy first pastebin. The big thing is that the server should not be able to read what people post, so the paste content needs to be encrypted and decrypted in the browser, and the link should carry what is needed to open it. Let people create text or code pastes, optionally protect them with a password, choose an expiration time, or make them burn after reading.

I also want the nice usability stuff, like markdown with preview, syntax highlighting for code, optional discussion replies, and a simple clean interface with a couple of theme choices. If it fits, support optional file uploads with previews for images, media, and PDFs, but keep that off by default. It should be easy to configure, support multiple languages, and be safe to run over HTTPS. Please keep it lightweight and straightforward to self host, and look up current docs online if you need to.