Update Dockerfile

Dockerfile

@@ -8,7 +8,7 @@ FROM ghcr.io/open-webui/open-webui:latest
 ENV ENABLE_OPENAI_API=true
 ENV DISABLE_EMBEDDINGS=false
 USER root
-RUN mkdir -p /app/data && chown -R 1000:1000 /app/data
+RUN mkdir -p /app/data && chown -R 1000:1000 /app/data && chmod -R 777 /app/data
 USER 1000
 # ---------------------------------------------------------
 # 3️⃣  (Optional) Expose a different host port – HF will map