ready for prod

Dockerfile

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+FROM python:3.12-slim
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user
+RUN useradd -m -r -s /bin/bash appuser
+
+# Create necessary directories
+WORKDIR /app
+RUN mkdir -p /app/uploads /app/thumbnails
+RUN chown -R appuser:appuser /app
+
+# Install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt gunicorn
+
+# Copy application files
+COPY --chown=appuser:appuser templates /app/templates
+COPY --chown=appuser:appuser app.py config.py models.py steganography.py ./
+
+# Switch to non-root user
+USER appuser
+
+# Use gunicorn for production
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "4", "--timeout", "120", "--access-logfile", "-", "--error-logfile", "-", "app:app"]