How to install nano on boot2docker
Boot2Docker is based on Tiny Linux which uses tce-load to install packages. The list of packages in the repository can be found here:
http://distro.ibiblio.org/tinycorelinux/tcz_2x.html
You'll see that the nano packages is nano.tcz , so you'll run something like:
tce-load -wi nano
This article: http://lowtek.ca/roo/2015/modify-boot2docker-iso/ should also be helpful along with this one: http://www.gerrelt.nl/RaspberryPi/wordpress/tutorial-unpluggable-squeezelite-player-on-tinycore/#Search_and_install_NANO_extension