My go to nanorc :) (Thanks @ariadneconill)

.nanorc

# set spacing options
set tabstospaces
set tabsize 4
set smarthome
set autoindent

# set line wrap
set fill 120
set atblanks

# set visual changes
set titlecolor white,black
set numbercolor brightcyan
set linenumbers
unset morespace

# set other plugins
set historylog  # something something search history
set locking     # lock files or sumn, idk.
set mouse       # mouse integration :)
set nohelp      # hide common keys at bottom
set suspend     # allows nano to be suspended
#set minibar    # nano >15.5, move bar to bottom