Create Dockerfile

Dockerfile

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+# Use a lightweight Python image
+FROM python:3.9
+
+# Create a non-root user
+RUN useradd -m -u 1000 user
+USER user
+ENV PATH="/home/user/.local/bin:$PATH"
+
+# Set working directory
+WORKDIR /app
+
+# Copy requirements and install as non-root
+COPY --chown=user ./requirements.txt requirements.txt
+RUN pip install --no-cache-dir --upgrade pip
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy app source code
+COPY --chown=user . /app
+
+# Expose port (match the Flask port or environment variable)
+EXPOSE 5000
+
+# Run Flask app using gunicorn for production (safer than Flask dev server)
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "app:app", "--workers", "2"]