Initial DocsMCP stack

backend/Dockerfile.webui

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+# WebUI-specific Dockerfile (uses same base as docs-api)
+FROM python:3.12-slim
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    DOCS_API_URL=http://docs-api:8787 \
+    WEBUI_PORT=8790
+
+# Install dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Copy requirements first for layer caching
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy backend code
+COPY backend/app /app/backend/app
+
+# Create uploads directory
+RUN mkdir -p /app/backend/app/webui/uploads
+
+# Expose port
+EXPOSE 8790
+
+CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "8790"]