Add local MarianMT translation service

translation-service/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 server.py ./
+
+ENV MARIAN_HOST=0.0.0.0
+ENV TRANSFORMERS_CACHE=/models
+VOLUME ["/models"]
+EXPOSE 8000
+
+CMD ["python", "server.py"]