Installer improvements

[leinss]

the 2 issues I had installing the services via the scripts were:

• for some reason echo -e "disable_log_bin\nwait_timeout = 31536000\ninteractive_timeout = 31536000" >> /etc/mysql/mysql.conf.d/mysqld.cnf copied also the -e over to the config which mysql didn't like and crashed 🤷🏼‍♂️
• all the specified node versions are breaking when using nvm use 22 or nvm use 20 and the minor versions change.
  • e.g. /root/.nvm/versions/node/v22.9.0/bin/node /root/edge-node-auth-service/index.js broke because nvm install 22 installed 22.10.0 now.
    • so I'd recommend specifying the exact version in the nvm install / nvm use command