v2.3.1

• Extend cookie expiration time
• Cookies can be configured through config.yaml
• Flag submission has more intuitive feedback
• Writeup submission has more intuitive feedback
• The rank page supports search
• The user management page supports search
• The personal profile page can display the current ranking
• The admin can see the email address through the personal profile page

Full Changelog: v2.3...v2.3.1