unifi: Switch from nginx to Caddy

Mostly for built-in ACME support.

roles/unifi/tasks/deploy.yml

@@ -30,23 +30,12 @@
   tags:
   - firewalld
 
-- name: ensure nginx is configured to proxy for unifi
+- name: ensure caddy is configured to proxy for unifi
   template:
-    src: unifi.nginx.conf.j2
-    dest: /etc/nginx/default.d/unifi.conf
-    mode: u=rw,go=r
+    src: unifi.caddyfile.j2
+    dest: /etc/caddy/Caddyfile.d/unifi.caddyfile
     owner: root
     group: root
+    mode: u=rw,go=r
   notify:
-  - reload nginx
-  tags:
-  - nginx
-
-- name: ensure selinux allows nginx to proxy for unifi
-  seboolean:
-    name: httpd_can_network_connect
-    persistent: true
-    state: true
-  tags:
-  - nginx
-  - selinux
+  - reload caddy