Create Dockerfile

Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+# System packages for Pillow/img2pdf support
+RUN apt-get update && apt-get install -y \
+    gcc \
+    libjpeg-dev \
+    zlib1g-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 5000
+
+CMD ["python", "app.py"]