add Dockerfile

Dockerfile

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+FROM python:3.11-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    HF_HOME=/tmp/hf \
+    TRANSFORMERS_CACHE=/tmp/hf \
+    PORT=7860
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+      git build-essential && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 7860
+
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]