update readme

README.md

@@ -1,3 +1,24 @@
 # Installation
 
-`ansible-pull -U http://git.klowner.com/mark/ansible-workstation -l <hostname>`
+Add the host to `inventory/hosts` and configure a
+`inventory/host_vars/<host>.yaml`
+
+Boot Arch install media with zfs and ansible included, eg:
+https://git.klowner.com/mark/archiso-klowner
+
+From the archiso:
+```bash
+ansible-pull -U https://git.klowner.com/mark/ansible-workstation \
+    -l <hostname> \
+    -e root_password=<password>
+```
+
+After system installation, reboot the system and boot from the newly installed
+system, then run `ansible-pull` again to provision the software & user
+environments.
+
+After logging in as root:
+```bash
+ansible-pull -U https://git.klowner.com/mark/ansible-workstation
+```
+*NOTE: neither root password or host name is needed here*