examples/k3s.yaml: add more descriptions and trivial fixes

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

examples/k3s.yaml

@@ -10,14 +10,16 @@
 # lima-k3s   Ready    control-plane,master   69s   v1.21.1+k3s1
 
 images:
-- location: "~/Downloads/hirsute-server-cloudimg-amd64.img"
+- location: "https://cloud-images.ubuntu.com/hirsute/current/hirsute-server-cloudimg-amd64.img"
   arch: "x86_64"
 
+# Mounts are disabled in this example, but can be enabled optionally.
 mounts: []
 
 ssh:
   localPort: 60022
 
+# containerd is managed by k3s, not by Lima, so the values are set to false here.
 containerd:
   system: false
   user: false
@@ -38,5 +40,5 @@ probes:
     fi
   hint: |
     The k3s kubeconfig file has not yet been created.
-    Run "lima bash sudo journalctl -u k3s" to check the log.
+    Run "limactl shell k3s sudo journalctl -u k3s" to check the log.
     If that is still empty, check the bottom of the log at "/var/log/cloud-init-output.log".