add fediverse workshop

slides/fediverse/fediverse.md

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+# Fediverse
+
+# History
+
+- OStatus protocol - GNU Social
+- no standard, was going to be standardized, but W3C created ActivityPub instead
+
+# ActivityPub
+
+![How-the-Fediverse-connects](slides/fediverse/How-the-Fediverse-connects.png)
+- created by W3C around 2019
+- different software talking same protocol (Mastodon,Peertube,PixelFed,Lemmy)
+- from Mastodon you can follow Lemmy users or Peertubers
+- Peertube videos send a link to video over ActivityPub, but not video itself
+- no E2E encryption
+- can't transfer your account from one server to another (federated, not distributed)
+- list of servers at [the-federation.info](https://the-federation.info/)
+- visual of all servers at [fediverse.space](https://fediverse.space)
+
+# Mastodon
+
+- local timeline
+- personal timeline 
+- following hashtags
+- no recommended posts, no sorting algorithms
+- moving mastodon account from one server to another is supported (moves all your followers and accounts that you follow to the new account)
+- some servers block other servers content (that have less strict moderation rules)