Set SDK to Docker in metadata

README.md

@@ -1,14 +1,19 @@
 ---
 title: PrepGraph Backend
-emoji: 🐠
-colorFrom: pink
-colorTo: red
-sdk: gradio
-sdk_version: 5.49.1
-app_file: app.py
+emoji: ⚡
+colorFrom: blue
+colorTo: purple
+sdk: docker
+app_port: 7860
 pinned: false
 license: mit
-short_description: FastAPI backend for PrepGraph — Groq-powered RAG chatbot.
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# 🧠 PrepGraph Backend
+
+This Space hosts the **PrepGraph backend** powered by FastAPI and Groq.
+It runs inside a Docker container and exposes endpoints such as `/chat` and `/health`.
+
+## 🚀 Run locally
+```bash
+uvicorn main_api:app --host 0.0.0.0 --port 7860