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Dockerfile

@@ -1,17 +1,19 @@
-# Pre-built image: PyTorch CPU + Transformers already installed (avoids ~190 MB torch download)
-FROM huggingface/transformers-pytorch-cpu:latest
+FROM python:3.11-slim
 
 WORKDIR /app
 
-# Base image ships with old pip -- upgrade first so it can resolve modern packages
-RUN pip install --upgrade pip && \
-    pip install --no-cache-dir \
-    fastapi \
-    "uvicorn[standard]" \
-    pandas \
-    sqlglot \
-    python-multipart \
-    huggingface_hub
+ENV LANG=C.UTF-8
+ENV LC_ALL=C.UTF-8
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc g++ \
+    && rm -rf /var/lib/apt/lists/*
+
+# CPU-only torch (~190 MB) -- cached after first successful build
+RUN pip install --no-cache-dir torch --index-url https://download.pytorch.org/whl/cpu
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
 
 # App source
 COPY src/ src/
@@ -24,4 +26,4 @@ COPY spider_data/database/concert_singer/ spider_data/database/concert_singer/
 # HF Spaces requires port 7860
 EXPOSE 7860
 
-CMD ["python3", "-m", "uvicorn", "src.app.api:app", "--host", "0.0.0.0", "--port", "7860"]
+CMD ["python", "-m", "uvicorn", "src.app.api:app", "--host", "0.0.0.0", "--port", "7860"]