bert: Update README

bert/README.md

@@ -1,13 +1,20 @@
-# Installation
+# `bert`
+
+## Installation
 1. Install NixOS minimal
 2. `ssh-keygen -N "" -f /etc/secrets/initrd/ssh_host_ed25519_key`
 2. Enable SSH server and add root SSH key
 3. Deploy updated config with `make`
 4. Set up [Remote Disk Unlocking](https://nixos.wiki/wiki/Remote_disk_unlocking)
    1. mkdir -p /etc/secrets/initrd && ssh-keygen -N "" -f /etc/secrets/initrd/ssh_host_25519_key
-5. Deploy content to web services
+5. Deploy content:
+   - websites in /srv
+   - factorio world at /var/lib/factorio/saves/default.zip
+   - git/forgejo in /var/lib/forgejo
+   - navidrome DB/etc in /var/lib/navidrome
+6. Set up Grafana users (log in with default admin/admin; change creds; configure)
 
-# Notes on Caddy
+## Notes on Caddy
 Until 2.8 is released with 24.11, Caddy has a pretty limited sense of what
 content-types should be compressed:
 
@@ -21,3 +28,23 @@ it.
 The list was expanded in this PR:
 
 https://github.com/caddyserver/caddy/pull/6081
+
+## SD card
+With some microSD cards, rebooting consistently leads to a boot loop. I was
+suspicious that it was all UHS microsd cards (which, these days, is most of 'em)
+based in part on information in this PR:
+https://github.com/armbian/build/pull/4824
+
+I currently have a card in there that reliably works, but I'm 90% sure that it's
+_also_ a UHS card? So I'm now really confused on what's going on. Do I have bad
+cards? Bad hardware? Bad bootloader? Bad kernel?
+
+Basically, what I've figured out is this: I have two Microcenter branded cards.
+One works every time. One never works. They contain the same contents
+(bootloader, kernel, etc). With that in mind, I guess I'm forced to conclude
+that it must be a difference in the cards. Both cards work fine for every other
+use, as far as I can tell.
+
+Anyway, I spent a fair bit of time trying to get it to work, but didn't succeed.
+After all that nonsense, I just found an SD card that happened to work reliably,
+used that one instead, and called it good enough! 🙃