Add Open WebUI swarm service

stack.yml

@@ -47,11 +47,37 @@ services:
     networks:
       - dokploy-network
 
+  open-webui:
+    image: ${OPEN_WEBUI_IMAGE:-ghcr.io/open-webui/open-webui:main}
+    ports:
+      - target: 8080
+        published: ${OPEN_WEBUI_PORT:-3000}
+        protocol: tcp
+        mode: host
+    environment:
+      WEBUI_NAME: ${OPEN_WEBUI_NAME:-Swarm AI}
+      WEBUI_SECRET_KEY: ${OPEN_WEBUI_SECRET_KEY:?set OPEN_WEBUI_SECRET_KEY}
+      WEBUI_URL: ${OPEN_WEBUI_URL:-}
+      ENABLE_SIGNUP: ${OPEN_WEBUI_ENABLE_SIGNUP:-true}
+    volumes:
+      - open-webui-data:/app/backend/data
+    deploy:
+      replicas: 1
+      placement:
+        constraints:
+          - node.hostname == ${OPEN_WEBUI_NODE_HOSTNAME:-tpi-n2}
+      restart_policy:
+        condition: on-failure
+    networks:
+      - dokploy-network
+
 volumes:
   whisper-models:
     name: whisper-models
   rkllm-root:
     name: rkllm-root
+  open-webui-data:
+    name: open-webui-data
 
 networks:
   dokploy-network: