feat: use virtual key for open-webui

.env.example

@@ -13,6 +13,10 @@ DEEPINFRA_API_KEY=...
 GROQ_API_KEY=gsk_...
 CEREBRAS_API_KEY=...
 
+# --- Open WebUI ---
+# Virtual key from LiteLLM (create in LiteLLM UI → Virtual Keys)
+OPENWEBUI_API_KEY=sk-...
+
 # --- Cloudflare Tunnel ---
 # Create a tunnel in Cloudflare Zero Trust dashboard → Networks → Tunnels
 # Copy the token from the tunnel install command

docker-compose.yml

@@ -91,7 +91,7 @@ services:
     environment:
       - OLLAMA_BASE_URL=
       - OPENAI_API_BASE_URL=http://litellm:4000/v1
-      - OPENAI_API_KEY=${LITELLM_MASTER_KEY}
+      - OPENAI_API_KEY=${OPENWEBUI_API_KEY}
       - ENABLE_RAG_WEB_SEARCH=true
       - RAG_WEB_SEARCH_ENGINE=searxng
       - SEARXNG_QUERY_URL=http://searxng:8080/search?q=<query>&format=json