Update Dockerfile

Dockerfile

@@ -16,7 +16,7 @@ RUN echo 'from fastapi import FastAPI, Request' > main.py && \
     echo '@app.post("/v1/embeddings")' >> main.py && \
     echo '@app.post("/v1/chat/completions")' >> main.py && \
     echo 'async def catch_all(request: Request):' >> main.py && \
-    echo 'return JSONResponse({"message": "Gemini Proxy is running"})' >> main.py && \
+    echo '    return JSONResponse({"message": "Gemini Proxy is running"})' >> main.py && \
     echo 'if __name__ == "__main__":' >> main.py && \
     echo 'uvicorn.run(app, host="0.0.0.0", port=7860)' >> main.py