run a rake task and ensure to be created postgresql user and db
Revert "refactor: use directory resource instead of bash (script) resource"

This reverts commit 159a26728b11e1d70ed19c150a4a6f4323cb189b.

It doesn't work as I expected, /usr/local/rbenv doesn't change owner.

Conflicts:
	chef/site-cookbooks/postinstall/recipes/default.rb
updated README
Use NFS
install node from package
installing rails is too slow, so remove it