feat(reverse-proxy): Add Caddy for reverse proxy

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/reverse_proxy/templates/Caddyfile.j2

@@ -0,0 +1,26 @@
+{
+    email {{ caddy.admin_email | default('admin@example.com') }}
+    acme_ca {{ caddy.acme_ca | default('https://acme-v02.api.letsencrypt.org/directory') }}
+}
+
+{% for service in services %}
+{{ service.name }}.{{ domain }} {
+    {% for vm in service.vm %}
+    reverse_proxy {{ hostvars[vm].ansible_host }}:{{ service.port }}
+    {% endfor %}
+    log {
+        output file /var/log/caddy/{{ service.name }}.log
+        format json
+    }
+	tls {
+		dns netcup {
+			customer_number {{ vault.netcup.customer_number }}
+			api_key {{ vault.netcup.api_key}}
+			api_password {{ vault.netcup.api_password }}
+		}
+    propagation_timeout 900s
+		propagation_delay 600s
+		resolvers 1.1.1.1
+	}
+}
+{% endfor %}