feat: migrate to UV package manager and enhance production config

- Replace pip with UV for faster dependency installation
- Switch base image from python:3.11-slim to debian:bookworm-slim
- Add SECURE_PROXY_SSL_HEADER for production SSL proxy support
- Optimize Docker layer caching by copying dependency files first
- Move database migration to build time for faster container startup
- Enhance Gunicorn logging with access and error log streams
- Update dependency management from requirements.txt to pyproject.toml

These changes improve build performance, production security, and
container startup time while modernizing the dependency management
workflow.

booking_system/settings.py

@@ -67,6 +67,9 @@ TEMPLATES = [
 
 WSGI_APPLICATION = 'booking_system.wsgi.application'
 
+if not DEBUG:
+    SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")
+
 
 # DATABASES = {
 #     'default': {

dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.11-slim
+FROM debian:bookworm-slim
 
 # Set environment variables
 ENV PYTHONDONTWRITEBYTECODE 1
@@ -7,24 +7,31 @@ ENV PYTHONUNBUFFERED 1
 # Set work directory
 WORKDIR /app
 
-# Install system dependencies
 RUN apt-get update && apt-get install -y \
-    gcc \
+    build-essential \
+    curl wget \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy requirements and install Python dependencies
-COPY requirements.txt .
-RUN pip install --no-cache-dir --upgrade pip
-RUN pip install --no-cache-dir -r requirements.txt
+RUN curl -LsSf https://astral.sh/uv/install.sh | sh
+ENV PATH="/root/.local/bin:${PATH}"
 
-# Copy project
+# Copy only the dependency definitions first to leverage Docker's layer caching
+COPY pyproject.toml uv.lock .python-version ./
+
+# Install Python dependencies for production
+RUN uv sync --no-group dev --group prod
+
+# Copy the rest of the application code into the container
 COPY . .
 
-# Collect static files
-RUN python manage.py collectstatic --noinput
+# Collect the static files
+RUN uv run --no-sync ./manage.py collectstatic --noinput
 
-# Expose port
+# Migrate the database
+RUN uv run --no-sync ./manage.py migrate
+
+# Expose the port Gunicorn will run on
 EXPOSE 8000
 
-# Run migrations and start Gunicorn
-CMD sh -c "python manage.py migrate && gunicorn booking_system.wsgi:application --bind 0.0.0.0:8000 --workers 3"
+# Run with gunicorn
+CMD ["uv", "run", "--no-sync", "gunicorn", "--bind", "0.0.0.0:8000", "--workers", "3", "--access-logfile", "-", "--error-logfile", "-", "--log-level", "info", "config.wsgi:application"]