Clone drupaldam to pi4

1. Open Backup and Migration in http://kpcp4.au.edu.tw/~chiao/drupaldam/dam/web/. Backup all tables and save it as backup_kpci7_drupaldam.sql.gz
   
2. gzip -d backup_kpci7_drupaldam.sql.gz > backup_kpci7_drupaldam.sql
3. sed 's/utf8mb4_0900_ai_ci/utf8mb4_unicode_ci/g' backup_kpci7_drupaldam.sql > backup_kpci7_drupaldam_unicode.sql
4. Open Backup and Migration in https://192.168.1.14/~chiao/drupaldam/dam/web/. Restore as with the file backup_kpci7_drupaldam_unicode.sql
5. Done.