v2.5.4

• tested with Python 3.12
• replaced mysql driver with mariadb driver
• upgraded Echarts lib from 5.3 to 5.5
• upgraded flag-icon-css lib from to 7.2
• upgraded bootstrap to 5.3.3
• issue #51: added total number of users & nodes connected Issue
• issue #56: added a simple counter
• issue #58

Full Changelog: v2.5.3...v2.5.4