Fix critical discrepancies found during validation audit

- Fix cert resolver name (cloudflare -> letsencrypt)
- Fix volume paths (/mnt/nas -> /data)
- Add missing custom port mappings
- Add privileged/capability flags
- Add 8 new roles: portainer, n8n, nodered, influxdb, guacamole, watchtower, rtlamr2mqtt, telegraf
- Fix Traefik template (ports, ACME path, wildcard cert)
- Add extra volume mounts for media services

roles/portainer/templates/docker-compose.yml.j2

@@ -0,0 +1,17 @@
+services:
+  portainer:
+    image: {{ portainer_image }}
+    container_name: portainer
+    restart: unless-stopped
+    ports:
+      - "9002:9000"
+      - "8000:8000"
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      - /data/portainer:/data
+    networks:
+      - {{ docker_network_name }}
+
+networks:
+  {{ docker_network_name }}:
+    external: true