Add the RustDesk server playbook

rustdesk/roles/network/tasks/main.yaml

@@ -0,0 +1,10 @@
+---
+# Caddy is the only thing that talks to hbbs/hbbr, so it joins the network the
+# RustDesk container lives on and can resolve it by container name.
+- name: "Ensure {{ docker_network }} Docker network exists"
+  docker_network:
+    name: "{{ docker_network }}"
+    state: present
+    connected:
+      - "{{ caddy_container }}"
+    appends: yes