========server資料========
網頁:
    https://mmwave.duckdns.org/mmwave/login
    帳號:admin
    密碼:123456

資料庫MariaDB:
    connection = mysql.connector.connect(
                host='34.56.202.29',
                user='webuser',
                password='U1224006',
                database='mmwave_v3'
            )

FileZilla, putty:
    主機:sftp://34.56.202.29
    使用者:mmwave
    密碼:AWR1843AOPEVM

用putty看資料庫:
    sudo mysql -u root -p
    password:AWR1843AOPEVM
    USE mmwave_v3;
    SHOW TABLES;

=================================
換mmwave_v4，map
1.mmwave_v4:database.py, utils/db_monitor.py
2.map:line.py, dashboard.html, database.py/get_zone_name, get_spatial_statistics

mmwave_v4：
TRUNCATE TABLE activity_logs;
TRUNCATE TABLE event_logs;
TRUNCATE TABLE notifications;