Updated nodejs buildpack docs:

[astrieanna]

• Clarify how to select yarn
• Give more information about offline vendoring and usage [#159302357, #159291499]

Signed-off-by: Andrew Meyer ameyer@pivotal.io

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this. Unfortunately, the Pivotal Tracker project is private so you may be unable to view the contents of the story.

The labels on this github issue will be updated when the story is started.

[cfdreddbot]

Hey astrieanna!

Thanks for submitting this pull request!

All pull request submitters and commit authors must have a Contributor License Agreement (CLA) on-file with us. Please have everyone sign the appropriate CLA (individual or corporate), and send to: contributors@cloudfoundry.org.

When sending a signed CLA please provide your github username in case of an individual CLA or the list of github usernames that can make pull requests on behalf of your organization.

The following github users: @Ben16 @ameyer-pivotal have not signed the appropriate CLA.

If you are confident that everyone listed is covered under a Corporate CLA, please make sure everyone has publicized their membership in the appropriate Github Org, per these instructions.

Once everyone has publicized their membership, one of the owners of this repository can close and reopen this pull request, and dreddbot will take another look.

[astrieanna]

Going to try again for CLA.

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this. Unfortunately, the Pivotal Tracker project is private so you may be unable to view the contents of the story.

The labels on this github issue will be updated when the story is started.

[cfdreddbot]

Hey astrieanna!

Thanks for submitting this pull request!

All pull request submitters and commit authors must have a Contributor License Agreement (CLA) on-file with us. Please have everyone sign the appropriate CLA (individual or corporate), and send to: contributors@cloudfoundry.org.

When sending a signed CLA please provide your github username in case of an individual CLA or the list of github usernames that can make pull requests on behalf of your organization.

The following github user @ameyer-pivotal has not signed the appropriate CLA.

If you are confident that everyone listed is covered under a Corporate CLA, please make sure everyone has publicized their membership in the appropriate Github Org, per these instructions.

Once everyone has publicized their membership, one of the owners of this repository can close and reopen this pull request, and dreddbot will take another look.

[astrieanna]

@ameyer-pivotal Also works at Pivotal. I'll bug him to publicize his org membership when he's back from vacation. This PR is actually fine to merge.

[bentarnoff]

Hey @astrieanna I think cfdreddbot is acting up because @ameyer-pivotal hasn't publicized their org membership?

[bentarnoff]

@astrieanna Perfect, thanks!