Updated Installation (markdown)

Installation.md

@@ -28,14 +28,14 @@ use ACLs unless you explicitly disable them. However, if you are using more
 obscure FS, make sure ACLs are in place (ReCodEx will work without ACLs, but
 all recodex-core CLI commands would have to be executed under `apache` user).
 
-After minimal installation of CentOS 8 (with enabled EPEL and Power Tools repos)
+After minimal installation of CentOS 8 compatible system like Alma or Rocky (with enabled EPEL and Power Tools repos)
 install the following: 
 * Apache 2.4 (httpd service), configure it, install SSL certificates, and open
   firewall for HTTPS
 * MariaDB (10.3 or newer); it is also recommended to secure the DB properly
   (set root password etc.) 
-* PHP 7.4 (7.3 is no longer supported and we have not fixed issues of PHP 8.x yet)
-* Node.js 12.x or newer (14.x recommended, 16.x not working yet)
+* PHP 8.1 (older versions are no longer supported)
+* Node.js 18.x
 
 A few tips for installing the database:
 ```
@@ -53,13 +53,13 @@ GRANT ALL PRIVILEGES ON `recodex`.* TO 'recodex'@'localhost';
 Configuring the PHP repository:
 ```
 # dnf install dnf-utils http://rpms.remirepo.net/enterprise/remi-release-8.rpm
-# dnf module enable php:remi-7.4
+# dnf module enable php:remi-8.1
 ```
 
 Installing Node.js:
 ```
 # dnf -y install curl
-# curl -sL https://rpm.nodesource.com/setup_14.x | bash -
+# curl -sL https://rpm.nodesource.com/setup_18.x | bash -
 # dnf -y install nodejs
 ```
 
@@ -600,12 +600,12 @@ you have already done this).
 
 ```
 # dnf -y install curl
-# curl -sL https://rpm.nodesource.com/setup_14.x | bash -
+# curl -sL https://rpm.nodesource.com/setup_18.x | bash -
 # dnf -y install nodejs
 ```
 
 You may check the right version is installed by typing `node -v`, which should
-report version of Node.js (starting with 14).
+report version of Node.js (starting with 18).
 
 
 #### PHP
@@ -615,7 +615,7 @@ you have already done this).
 
 ```
 # dnf install dnf-utils http://rpms.remirepo.net/enterprise/remi-release-8.rpm
-# dnf module enable php:remi-7.4
+# dnf module enable php:remi-8.1
 # dnf install php-cli
 ```