Registry updated to v3 and from nginx to caddy

registry/roles/network/tasks/main.yaml

@@ -0,0 +1,8 @@
+---
+- name: "Ensure {{ docker_container }} Docker network exists"
+  docker_network:
+    name: "{{ docker_network }}"
+    state: present
+    connected:
+      - "{{ caddy_container }}"
+    appends: yes