I want to clear all possible options when I install packages that work as services.
For example, can get postgresql by typing by non-root user `$ guix package -i postgresql` and run it? How to run it?
Can I install postgresql and run it only when I need?
Do I need install it only from defining service in config.scm and typing `# guix system reconfigure config.scm` ?
Manual "6.2.15 Defining Services" has lot of variables and I do not k
now where to find them definitions.