Install Mediawiki

sudo su

apt install mariadb-server

mysql

CREATE USER 'wiki'@'localhost' IDENTIFIED BY 'INSERTPASSWORDHERE';

CREATE DATABASE wikidb;

GRANT ALL PRIVILEGES ON wikidb.* TO 'wiki'@'localhost';

FLUSH PRIVILEGES;

EXIT;

apt install php php-fpm php-mysql php-xml php-intl php-mbstring php-gd php-curl

Download Mediawiki from the website

into the folder: /opt/, rename folder to wiki

chown -R www-data:www-data /opt/wiki/
chmod -R 755 /opt/wiki/

Configure nginx

# ---------------------------------------------------
# WIKI 

location /wiki/ {
        root /opt/;
        index index.php;
        location ~ \.php$ {
                include snippets/fastcgi-php.conf;
                fastcgi_pass unix:/run/php/php8.4-fpm.sock;
                include fastcgi_params;
        }
}