#17 risolvere versione di nodejs non corrette segnalate sabato

* add gpg key using _"curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"_ * add APT repo (verify/create) _nodesource.list_ file in _/etc/apt/sources.list.d_ with: ``` deb https://deb.nodesource.com/node_6.x jessie main deb-src https://deb.nodesource.com/node_6.x jessie main ``` Alternative setup: __"sudo curl -sL https://deb.nodesource.com/setup_6.x | bash -"__ (it supports Kali, Debian, Mint, ...) Cleanup: _"apt-get purge nodejs"_ Refresh: _"apt-get update && apt-get install nodejs nom"_ Ps: aggiornare sezione dev di README.MD ? aggiornare i requirements nel link al blog post di dev wks setup?