create-a-container: add a /logout route

[runleveldev]

Issue: Add /logout endpoint to handle user sign-out

Description:
There is currently no route to terminate user sessions. Users remain logged in until their session expires manually.

Recommendation:
Implement a /logout route that:

1. Destroys the active session
2. Redirects the user to the login page

Example:

app.get('/logout', (req, res) => {
  req.session.destroy(() => res.redirect('/login'));
});

Benefits:

• Provides a clear and secure logout mechanism
• Prevents unauthorized session reuse
• Improves user experience and session management compliance