Add caddy reverse proxy role

Acts as reverse proxy for the docker instance. Can be configured through
docker labels. Proxies anything that is received on port 80 or 443.

ansible/playbook.yaml

@@ -25,6 +25,11 @@
 - name: Prepare all docker hosted containers
   hosts: instance_system
   tasks:
+    - name: Set up Caddy stack
+      ansible.builtin.import_role:
+        name: caddy
+      tags: caddy
+
     - name: Set up Arr stack
       ansible.builtin.import_role:
         name: arr