Updated user docs getting started chapter
Updated user docs getting started chapter

Added an example of how to configure a gateway and
changed examples to use gdbus call instead of dbus-send.

kursatkobya/softwarecontainer,DunderRoffe/softwarecontainer,tobsan/softwarecontainer,Pelagicore/softwarecontainer,Pelagicore/softwarecontainer,DunderRoffe/softwarecontainer,Pelagicore/softwarecontainer,frznlogic/softwarecontainer,DunderRoffe/softwarecontainer,tobsan/softwarecontainer,thenor/softwarecontainer,tobsan/softwarecontainer,thenor/softwarecontainer,DunderRoffe/softwarecontainer,Pelagicore/softwarecontainer,kursatkobya/softwarecontainer,thenor/softwarecontainer,frznlogic/softwarecontainer,frznlogic/softwarecontainer,thenor/softwarecontainer,kursatkobya/softwarecontainer,kursatkobya/softwarecontainer,tobsan/softwarecontainer,frznlogic/softwarecontainer