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Dockerfile

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+# ============================================
+# Audiobook Maker Pro v4 - Production Dockerfile
+# CPU-only build — no CUDA/MPS dependencies
+# ============================================
+
+FROM python:3.11-slim
+
+# Install system dependencies for pydub (ffmpeg), python-docx, olefile, PyMuPDF
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ffmpeg \
+    libmupdf-dev \
+    libfreetype6 \
+    libharfbuzz0b \
+    libjpeg62-turbo \
+    libopenjp2-7 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /app
+
+# Copy requirements first for better layer caching
+COPY requirements.txt .
+
+# Install Python dependencies — CPU only, no CUDA
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create the persistent data directory at build time
+# (Coolify volume mount will overlay this at runtime)
+RUN mkdir -p /opt/apps/audiobook-maker-pro-v4
+
+# Expose the application port
+EXPOSE 5009
+
+# Health check — Coolify uses this to determine container readiness
+HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:5009/login')" || exit 1
+
+# Run with gunicorn for production
+CMD ["gunicorn", \
+     "--bind", "0.0.0.0:5009", \
+     "--workers", "3", \
+     "--threads", "2", \
+     "--timeout", "300", \
+     "--worker-class", "gthread", \
+     "--access-logfile", "-", \
+     "--error-logfile", "-", \
+     "app:app"]