set timezone instructions

[ejmg]

currently only specify setting hardware clock, never properly set timezone of machine with

ln -sf /usr/share/zoneinfo/Region/City /etc/localtime

as specified in wiki.

If possible, maybe use time datectl instead, which seems a lot more ""user friendly"" by not using system links. Should make sure it is equivalent (and w/o negative effects) as the command specified by wiki. Here's a SE answer about using it.

[ejmg]

realized that #8 touches on this technically but shrug