Added tailscale

Also routes the whole subnet of the cluster over tailscale so it can act
as an entry point to my home network even when not at home.

patches/tailscale.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1alpha1
+kind: ExtensionServiceConfig
+name: tailscale
+environment:
+    - TS_AUTHKEY={{ config.tailscale.authKey }}
+    - TS_EXTRA_ARGS=--login-server {{ config.tailscale.loginServer }}
+    - TS_ROUTES={{ helper.tailscale_subnet(node.gateway, node.netmask) }}