update readme

README.md

@@ -8,4 +8,12 @@ git commit -m "Initial commit"
 git branch -M main
 git remote add origin http://git.pb.bib.de/PBBFA23CIV/EIANotesApp.git
 git push -u origin main
+```
+
+Remember to update the credentials in `Datebase.php`
+```PHP
+private $dbName = "..."; //Datenbankname
+private $linkName = "mysql.pb.bib.de"; //Datenbank-Server
+private $user = "..."; //Benutzername
+private $pw = "..."; //Passwort
 ```