added opengraph tags to fmrl-client if one local user is being viewed #fmrl

https://thebackupbox.net/cgi-bin/fmrl-client.cgi?user=epoch

@bradley if you plan on continuing to develop your server, you're welcome to join #fmrl on libera.chat IRC. Or #fmrl:libera.chat for Matrix.

@makeworld So we have #twtxt (popular in Web and #gopher), #tinylog (especially for #gemini), renaissance of #finger and now #fmrl. The first threes are about plaintext data structure, fitting into #smallnet philosophy. I don't know what about proposed #json format, or it isn't about small-net?

gopher://gopher.floodgap.com/7/v2/vs/?twtxt
https://github.com/buckket/twtxt
https://codeberg.org/bacardi55/gemini-tinylog-rfc