Send a file with end-to-end encryption, inspired by https://encrypt.one, but something you can run locally.
The file is encrypted before being served as a static file, and then decrypted in the recipient's browser
Set NGROK_AUTHTOKEN in your environment.
To find where your authtoken is, run ngrok config check, and it should print out the config file location.
NGROK_AUTHTOKEN=... go run github.com/streamco/serve.one@latest <filename>