Fix provisioning script

Author: therobinkim

bootstrap.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-apt-get update
+sudo apt-get update
 
 wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.30.2/install.sh | bash
 
@@ -9,3 +9,4 @@ echo "source /home/vagrant/.nvm/nvm.sh" >> /home/vagrant/.profile
 source /home/vagrant/.profile
 
 nvm install node
+nvm alias default node