Same settings for all users on mac

Configuration Profiles is probably what you want. Greg Neagle did a talk about this at PSU MacAdmins a few years ago. You can also check out other videos discussing the topic here: http://macadmins.psu.edu/resources-archive/

Preference Management with Profiles – Greg Neagle:
https://cpb-us-e1.wpmucdn.com/sites.psu.edu/dist/4/24696/files/2016/07/psumac2016-57-PSUMacAdmins2016-Preferences-Management-with-Profiles.pdf
https://youtube.com//watch?v=gTw3U-vxung

There's also this book: https://scriptingosx.com/pr3-for-apple-administrators/

Just found for making a master template for the dock icons there is the dockutil software that can be used.
I have downloaded it, but everytime I try to run a command fx

dockutil --add /Applications/TextEdit.app

it just reply back "command not found"

Do I miss something - the example is copied should work, and I am running it from the library where dockutil is located

If the specific directory where the dockutil executable is located isn't in the shell path, then you need to provide the path to the executable.

If you're in the directory where dockutil is located, you could launch it by typing

./dockutil

( The period is a shorthand way of saying "the current directory.")

Otherwise, you would have to specify the full path, such as (example only, I don't know where you have put dockutil on your system:

/Library/Application Support/DockUtil/dockutil

Use a config profile for the homepage for safari and chrome (com.google.Chrome) as a plist file. For the dock options we just deploy the dock plist as a dmg with FEU and FUT ticked. This gets deployed after enrolment is complete.