We must also mention "younohost"(https://yunohost.org/fr) which is french and who does the same job as dietpi for raspberry and which is also "user friendly" or even more. I have not yet tested yunohost because i had put aside raspberry pi after too many weird mouse bugs. My research to avoid these weird mouse bugs have not concluded positively to any solution (purism, odroid, raspberry, orangpi, macbook, windows, see security section), i can only send a feedback on what i have really tried.
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