Add a statement about the non-standard Tor buildpack, along with instructions to remove. Also add a pointer to the Heroku page describing the method to link the app to a personal domain.
It was unclear how to get the HEX of the TLS cert. Initially I had been trying to use openssl to export the hex of the signature, which was wrong. I finally realized that the xxd command was intended to be applied on the entire tls.cert file, and that worked. So I added this to clarify that aspect.
Colin CrossmanandGitHub