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+FROM python:3.10-slim
+
+WORKDIR /app
+
+# System libs needed by RDKit/matplotlib
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libxrender1 libxext6 libglib2.0-0 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Step 1: CPU-only torch (smaller, ~200MB vs 2.4GB for CUDA)
+RUN pip install --no-cache-dir \
+    --extra-index-url https://download.pytorch.org/whl/cpu \
+    torch==2.4.0+cpu
+
+# Step 2: PyG + everything else
+RUN pip install --no-cache-dir \
+    torch_geometric==2.6.1 \
+    rdkit \
+    matplotlib \
+    gradio==5.49.1
+
+# Non-root user required by HuggingFace
+RUN useradd -m -u 1000 user
+USER user
+ENV HOME=/home/user PATH=/home/user/.local/bin:$PATH
+
+COPY --chown=user . /app
+
+EXPOSE 7860
+
+CMD ["python", "app.py"]