update readme

README.md

@@ -7,10 +7,23 @@ Chat with people, not AI.
 https://chatmux.com/
 
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+"sprint" 2
 
+Added github login to let users identify themselves with a name and avatar image. I just implemented [GitHub OAuth](https://docs.github.com/en/apps/oauth-apps/building-oauth-apps/authorizing-oauth-apps) from scratch for this. It's a very simple [protocol](https://datatracker.ietf.org/doc/html/rfc6749) to follow. 
+
+Added d3 visualization of chat rooms using [pack enclose](https://observablehq.com/@d3/d3-packenclose) with dynamic [svg path based labels](https://www.visualcinnamon.com/2015/09/placing-text-on-arcs/). 
+
+Then a friend went to Japan. I thought, 'What a great opportunity to test with someone very geographically distant!" That turned into an epic troubleshooting adventure. I learned a lot about how Deno Deploy works. I tried so hard to get this thing working reliably on Deno Deploy which is not really set up to handle long-running servers. It will spin up V8 isolates geographically close to users and then terminate them with no warning. DenoKV proved to be unreliable in general and a massive pain in practice for synchronizing state between the isolates. This is not the work I'm interested in doing. I've wasted a week on this. Ugh.
+
+...sooo, I moved everything to a Digital Ocean droplet and learned a lot about to host things in Linux. That only took a few hours to figure out and now I have one always-on server with HTTPS that should be good for as many users as I'm likely to ever have for this thing, but will be easy to scale vertically if necessary. 
+
+That's enough devops for now. Moving on to more fun stuff.
+
+
+------
+"sprint" 1 
 
 This started out as a quick exploration of [server sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events). Then I got super curious about [webRTC](https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API). All the connections flying around needed a fun visualization, so let's learn [D3](https://d3js.org/)! Oh, I also wanted to try [SolidJS](https://www.solidjs.com/). And [Deno](https://deno.com/). Then I was having enough fun that I put it on [deno deploy](https://deno.com/deploy) and got a [domain](https://chatmux.com/). 
 
 Not bad for a couple weeks of excited but fairly aimless tinkering.
 
-More to come... I'm having a blast.