Installation:

Install a "LAMP" server via your distribution:
* web server 
  + with php capabilities
* sql database (mariadb)
* email server/ability to send emails (optional)

Example for debian: 
webserver:
 apt-get install apache2 openssl python3-certbot-apache php-mysql php-json
sql database:
 apt-get install mariadb-server mariadb-client

Copy the contents of the html directory into your webserver tree

create database and database user

restore database from backup:
TODO

edit konfiguration.php and adapt to your installation

login with admin user: admin@admin.de pw: 4024ae463a4ef9ff455705afe54f83c3