Add systemd example to README.md

README.md

@@ -5,6 +5,7 @@ Turn container images into bootable VMs
 ## Example
 
 ```Dockerfile
+# ./example/alpine/Containerfile
 FROM alpine:latest
 CMD ["/bin/sh"]
 ```
@@ -25,6 +26,15 @@ boco image rm boco-alpine
 podman image rm boco-alpine
 ```
 
+Can also be used to boot a more traditional systemd-based VM:
+
+```Dockerfile
+FROM archlinux:latest
+
+# This works! Although you should probably add a user or some services.
+CMD ["/sbin/init"]
+```
+
 ## Kernel
 
 boco boots VMs using a shared kernel at `$XDG_DATA_HOME/boco/registry/vmlinuz`.