PhpMyAdmin

Prerequisite
To install PhpMyAdmin, you will need to have Nginx, PHP, MariaDB and Let’s Encrypt installed.

Install
The installer will ask you several questions. Here are the answers:
 * Web server to reconfigure automatically?
 * Choose none. Nginx will be configured later.


 * Configure database for phpmyadmin with dbconfig-common?
 * Yes


 * Password of the database's administrative user?
 * Enter your MariaDB root user password.


 * MySQL application password for phpmyadmin?
 * Keep it empty to get a random one. You will never need to enter this password

Absolute URI
When placed behind a reverse proxy, phpMyAdmin might have trouble generating correct URLs. One manifestation is that after successful login, the URL you are redirected to is broken.

Fixing that is quite easy. Just create file  with the following content: