Add Dockerfile for HF Space

Dockerfile

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+# Dockerfile
+FROM python:3.11-slim
+
+RUN useradd -m -u 1000 user
+USER user
+ENV PATH="/home/user/.local/bin:$PATH"
+
+WORKDIR /app
+
+# Copier les fichiers de requirements
+COPY --chown=user ./requirements.txt requirements.txt
+RUN pip install --no-cache-dir --upgrade -r requirements.txt
+
+# Copier tout le code
+COPY --chown=user . /app
+
+# Exposer le port 7860 (requis par HF Spaces)
+EXPOSE 7860
+
+# Lancer l'application FastAPI
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]