docs: update bootstrap steps

.repo/README.md

@@ -1,12 +1,23 @@
 # README
 
-```sh
+Ensure local repository is in `/etc/pacman.conf`, using the `file://` format.
-# create GPG keys
-# copy {pacman,makepkg}-grawlinson.conf to /etc/aurutils
 
-# create systemd-nspawn chroot for aurbuild
+```conf
-aur chroot --create -M /etc/aurutils/makepkg-grawlinson.conf -C /etc/aurutils/pacman-grawlinson.conf
+[grawlinson]
-
+Server = file:///var/lib/repo/grawlinson
-# build package
+```
-aur build --chroot --gpg-sign --remove
+
+Ensure GPG keys for signing packages & repositories have been created,
+and exist in pacman's keyring.
+
+Copy aurutils configuration to the global directory.
+
+```sh
+cp -t /etc/aurutils {pacman,makepkg}-grawlinson.conf
+```
+
+Create a `systemd-nspawn` instance for aurbuild.
+
+```sh
+aur chroot --create -M /etc/aurutils/makepkg-grawlinson.conf -C /etc/aurutils/pacman-grawlinson.conf
 ```