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Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 7860
+
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]

main.py

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+from fastapi import FastAPI
+
+app = FastAPI()
+
+@app.get("/")
+def home():
+    return {"message": "Backend is working"}
+
+@app.get("/chat")
+def chat(prompt: str):
+    return {
+        "reply": f"You said: {prompt}"
+    }

requirements.txt

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+fastapi
+uvicorn