Workaround for file permission conflicts

[JanKalin]

I had problems following the guide. On the one hand you create directory /srv/rocketpool and copy files there as an ordinary user. The command rp (alias) is also executed for this user.

On the other hand the server runs as user rp and has problems creating directories, reading files,....

The solution is to change the alias so that it runs as the user rp, using sudo.