Create Dockerfile

Dockerfile

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+FROM python:3.10-slim
+
+# System dependencies
+RUN apt-get update && apt-get install -y build-essential && rm -rf /var/lib/apt/lists/*
+
+# Install Python deps first
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Set environment variables
+ENV NLTK_DATA=/usr/local/nltk_data
+ENV HF_HOME=/usr/local/huggingface_cache
+
+# Create writable directories
+RUN mkdir -p $NLTK_DATA $HF_HOME
+
+# Download NLTK, spaCy model, and sentence-transformers model at build time
+RUN python -m nltk.downloader punkt && \
+    python -m spacy download en_core_web_sm && \
+    python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('all-MiniLM-L6-v2')"
+
+# Set working directory and copy app code
+WORKDIR /app
+COPY . .
+
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]