been doing freecodecamp
almost have web design certificate
my martial arts school needs a web page
i volunteer since i need the practice and may look good in portfolio
but, i need to run everything by the owner before it is published.
however, he is NOT tech savvy (still using old Motorola i530 from Nextel).
where can i build a workable prototype which he can use/click/browse but other people can not see it?