So now we install a specific version of Node.js and use the packages
required for Debian Bookworm.
For consistency, we're also making them similar to the Ubuntu
instructions and installing rbenv instead of RVM. Since we now suggest
rbenv in both cases as well as in the macOS instructions, we're also
listing rbenv as the first option in the generic local installation
instructions.
This command simplifies some of the steps. However, there's a gotcha: it
might fail if the database requires username and password and they
haven't been configured before executing it.
Note that, in order to have some consistency, we're always writing
"Consul Democracy", instead of using capital letters sometimes (but not
always), like we did until now.
