fixed bootstrap error
Deleting migration files
Updated gemfile
Updated gemfile
Adding postgresql for heroku
Revert "Deleting migration files"

This reverts commit 96b30493145f27d74e05d786101b84d3ff5e3190.
Revert "fixed bootstrap error"

This reverts commit d32af56c560c8e19e53303d8a3b098de7cb0d4f9.