Refactor user authentication and dashboard features

- Added `is_admin` field to User model for role management.
- Updated user context middleware to include current user in templates.
- Enhanced session management with improved debug middleware.
- Refactored dashboard view to fetch user-specific data and recent events.
- Improved login and registration templates for better user experience.
- Added admin routes with access control for admin users.
- Updated Docker configuration for better error logging and dependency management.
- Updated requirements to include new dependencies and specify versions.

Dockerfile

@@ -18,6 +18,9 @@ COPY requirements.txt .
 # Install dependencies
 RUN pip install --no-cache-dir -r requirements.txt
 
+# Explicitly install pymysql (in case it's missing from requirements.txt)
+RUN pip install --no-cache-dir pymysql cryptography
+
 # Copy the rest of the code
 COPY . .