Retry if logs suggest an intermittent npm issue

[hunterloftis]

For instance, npm occasionally fails with "ECONNRESET" and "Callback called more than once." Perhaps restart the buildpack if certain strings are seen in the output stream?

[hunterloftis]

• Error during npm install - ECONNRESET npm/npm#9418
• Seeing elevated network read ECONNRESET from AWS npm/npm#12484
• update scoped packages in bulk queries status info npm/registry#10

[webuniverseio]

You might want to give jfromaniello/npm-install-retry#7 a try

[hunterloftis]

Thanks for the link @szarouski!

[jmorrell]

Closing this since it seems to be less of an issue now. I'll revisit if it starts coming up again.