feat(edge_vps): add pangolin/gerbil/traefik stack with versioned images

roles/edge_vps/templates/pangolin/docker-compose.yml.j2

@@ -1,25 +1,58 @@
+name: pangolin
 services:
   pangolin:
-    image: fosrl/pangolin:latest
+    image: docker.io/fosrl/pangolin:{{ edge_vps_pangolin_version }}
     container_name: pangolin
     restart: unless-stopped
-    ports:
-      - "3001:3001"
-      - "443:443"
-      - "80:80"
     volumes:
-      - ./config.yml:/app/config/config.yml:ro
-      - ./letsencrypt:/letsencrypt
-    depends_on:
-      - gerbil
+      - ./config:/app/config
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3001/api/v1/"]
+      interval: "10s"
+      timeout: "10s"
+      retries: 15
 
   gerbil:
-    image: fosrl/gerbil:latest
+    image: docker.io/fosrl/gerbil:{{ edge_vps_gerbil_version }}
     container_name: gerbil
     restart: unless-stopped
-    network_mode: host
+    depends_on:
+      pangolin:
+        condition: service_healthy
+    command:
+      - --reachableAt=http://gerbil:3004
+      - --generateAndSaveKeyTo=/var/config/key
+      - --remoteConfig=http://pangolin:3001/api/v1/
+    volumes:
+      - ./config/:/var/config
     cap_add:
       - NET_ADMIN
       - SYS_MODULE
+    ports:
+      - 51820:51820/udp
+      - 21820:21820/udp
+      - 443:443
+      - 80:80
+      - 6443:6443
+
+  traefik:
+    image: docker.io/traefik:{{ edge_vps_traefik_version }}
+    container_name: traefik
+    restart: unless-stopped
+    network_mode: service:gerbil
+    depends_on:
+      pangolin:
+        condition: service_healthy
+    command:
+      - --configFile=/etc/traefik/traefik_config.yml
+    environment:
+      CLOUDFLARE_DNS_API_TOKEN: {{ vault_edge_vps.traefik.cloudflare_api_token }}
     volumes:
-      - /lib/modules:/lib/modules
+      - ./config/traefik:/etc/traefik:ro
+      - ./config/letsencrypt:/letsencrypt
+      - ./config/traefik/logs:/var/log/traefik
+
+networks:
+  default:
+    driver: bridge
+    name: pangolin