Refactor application ports to 12000 for backend and 12001 for frontend; update documentation and configuration files accordingly

Co-authored-by: Copilot <copilot@github.com>

frontend/Dockerfile

@@ -0,0 +1,21 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements and install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Expose port
+EXPOSE 12001
+
+# Run the application
+CMD ["gunicorn", "app.main:app", "--bind", "0.0.0.0:12001", "--workers", "2", "--timeout", "120"]