How to add your own hotkeys?

Question

atom

Tell me how to add hotkeys to the Atom editor?
In keymap.cson I add:

# 'atom-text-editor':
#   'enter': 'editor:newline'
#   'ctrl-alt-d': 'custom:addDiv'

In init.coffee:

# atom.commands.add 'atom-text-editor', 'custom:addDiv', ->
#   atom.workspace.getActiveTextEditor()?.insertText('<div class=""></div>')
#   atom.workspace.getActiveTextEditor()?.moveLeft(6)

Reloading the editor. There is no effect.