Add Dockerfile that builds from smolagents/ml-intern source

Dockerfile

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+# Clone and build from smolagents/ml-intern source
+FROM node:20-alpine AS frontend-builder
+RUN apk add --no-cache git
+RUN git clone --depth 1 https://huggingface.co/spaces/smolagents/ml-intern /source
+WORKDIR /source/frontend
+RUN npm install && npm run build
+
+# Stage 2: Production
+FROM python:3.12-slim
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
+RUN useradd -m -u 1000 user
+WORKDIR /app
+RUN apt-get update && apt-get install -y --no-install-recommends git curl && rm -rf /var/lib/apt/lists/*
+
+# Clone source
+RUN git clone --depth 1 https://huggingface.co/spaces/smolagents/ml-intern /tmp/source && \
+    cp /tmp/source/pyproject.toml /tmp/source/uv.lock ./ && \
+    cp -r /tmp/source/agent ./agent && \
+    cp -r /tmp/source/backend ./backend && \
+    cp -r /tmp/source/configs ./configs && \
+    rm -rf /tmp/source
+
+# Install dependencies
+RUN uv sync --no-dev --frozen
+
+# Copy built frontend
+COPY --from=frontend-builder /source/frontend/dist ./static/
+
+# Create directories
+RUN mkdir -p /app/session_logs && chown -R user:user /app
+
+USER user
+ENV HOME=/home/user \
+    PYTHONUNBUFFERED=1 \
+    PYTHONPATH=/app \
+    PATH="/app/.venv/bin:$PATH"
+
+EXPOSE 7860
+WORKDIR /app/backend
+CMD ["bash", "start.sh"]