Create Dockerfile

Dockerfile

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+# 1. Stable Python base
+FROM python:3.11-slim
+
+# 2. System dependencies (root)
+RUN apt-get update && apt-get install -y \
+    libgomp1 \
+    && rm -rf /var/lib/apt/lists/*
+
+# 3. Create non-root user
+RUN useradd -m -u 1000 user
+ENV HOME=/home/user \
+    PATH=/home/user/.local/bin:$PATH
+WORKDIR $HOME/app
+
+# 4. Permissions
+RUN chown -R user:user $HOME
+USER user
+
+# 5. Environment (FIXED)
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    HF_HOME=$HOME/.cache/huggingface
+
+# 6. Copy requirements first (better caching)
+COPY --chown=user requirements.txt .
+
+# 7. Install deps (Torch first = correct move)
+RUN pip install --upgrade pip && \
+    pip install --no-cache-dir torch --index-url https://download.pytorch.org/whl/cpu && \
+    pip install --no-cache-dir -r requirements.txt --extra-index-url https://download.pytorch.org/whl/cpu
+
+# 8. Copy app code
+COPY --chown=user . .
+
+# 9. Pre-download model (zero cold start)
+RUN python -c "from sentence_transformers import CrossEncoder; CrossEncoder('cross-encoder/ms-marco-MiniLM-L6-v2')"
+
+# 10. Expose + run
+EXPOSE 7860
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]