Secret: A simple self-hosted e2e encrypted alternative to onetimesecret

I wanted a simple to use, easy to deploy tool to send sensitive data to clients. I was often using onetimesecret which is great, but still felt wary of trusting a hosted service for these things. While they have indeed open sourced their code, I wanted an even simpler/easy to deploy version (just php7/apache) that is also e2e encrypted. I hope this could be useful to others.