Create Dockerfile

Dockerfile

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+FROM python:3.10-slim
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+ENV HOME=/app
+ENV PADDLEOCR_HOME=/app/.paddleocr
+
+WORKDIR /app
+
+# Create writable OCR model directory and non-root user
+RUN mkdir -p /app/.paddleocr && \
+    adduser --disabled-password --gecos '' appuser && \
+    chown -R appuser:appuser /app
+
+# Install system dependencies
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        poppler-utils \
+        tesseract-ocr \
+        libgl1-mesa-glx \
+        libglib2.0-0 \
+        libsm6 \
+        libxext6 \
+        libxrender-dev \
+        libgl1 \
+        libglib2.0-dev \
+        libcairo2 \
+        libpango1.0-0 \
+        libpangocairo-1.0-0 \
+        libgdk-pixbuf2.0-0 \
+        python3-tk \
+        ghostscript \
+        libgomp1 \
+        curl \
+    && apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Install Python packages
+COPY requirements.txt .
+RUN pip install --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Switch to non-root user
+USER appuser
+
+# Expose port 3001
+EXPOSE 3001
+
+# Start app
+CMD ["python", "app.py"]