docs(readme): document pre-bootstrap user creation

Make the 'wheel user must already exist' prerequisite explicit with a
three-line useradd/passwd snippet, rather than leaving it implicit in
bootstrap.sh's preconditions.

1 files changed, 13 insertions, 8 deletions

diff --git a/README.md b/README.md
index 8ae2b57..1b43116 100644
--- a/README.md
+++ b/README.md
@@ -4,25 +4,30 @@ My Arch Linux configuration, managed with [chezmoi](https://www.chezmoi.io/).
 
 ## Bootstrap on a fresh Arch install
 
-As the regular wheel user (not root), on a minimal Arch system (only
-`base` installed):
+`bootstrap.sh` assumes the Arch installation guide has been followed up
+to the point of having a booted system with a wheel-group user. On a
+minimal system (only `base` installed), prepare the user once as root:
+
+```sh
+pacman -S --needed sudo
+useradd -m -G wheel -s /bin/bash <user>
+passwd <user>
+```
+
+Then log in as that user and run:
 
 ```sh
 curl -fsSL https://raw.githubusercontent.com/sommerfelddev/dotfiles/master/bootstrap.sh | sh
 ```
 
-This installs pacman prerequisites, enables `%wheel` in sudoers, builds
-`paru-bin` from the AUR, clones this repo to `~/dotfiles`, runs
+The script installs pacman prerequisites, enables `%wheel` in sudoers,
+builds `paru-bin` from the AUR, clones this repo to `~/dotfiles`, runs
 `just init`, enables recommended systemd units (fstrim, timesyncd,
 resolved, reflector, paccache, pkgstats, acpid, cpupower, iwd, plus tlp
 on laptops), refreshes the pacman mirrorlist, creates XDG user
 directories, and — on EFI systems missing an Arch boot entry —
 launches `create-efi`.
 
-The script assumes the Arch installation guide has already been
-followed up to the point of creating a wheel-group user and booting
-into their session.
-
 ## Setup on an existing system
 
 ```sh