* add --offline flag when we are using yarn and we are offline

* Revert changes to init script

We only run these commands for backward compat mode, in which we wouldn't receive the offline flag anyway

* Don't pass isOnline to init script because it doesn't need it

* Don't ping the Yarn registry if user doesn't have Yarn

* Remove unused/wrong arguments

* Move logs to error handler

* Fix error handling

* Report to the user that they're offline