Fix e2e:docker script

[bugzpodder]

yarn e2e:docker works locally with this change. Tested before after, before test fails at yarn publish. After yarn publish works as expected.
Checking CI builds.

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[gaearon]

Can we move this to tasks?

[gaearon]

Thanks!

[iansu]

Did CI pass with these changes?

[bugzpodder]

@iansu both appveyor and travis are green
https://travis-ci.org/facebook/create-react-app
https://ci.appveyor.com/project/fbOpenSource/create-react-app

[gaearon]

Does CI even use this script? I thought it didn't.

[gaearon]

(Travis definitely passed, AppVeyor was failing during yarn fetch which was a common transient issue before so I ignored it)

[bugzpodder]

I ended up reverting the change in e2e-installs because running it locally was also failing at the same line. But alas I ran it now (after adding back the change) and it just passed.

The CIs were indeed using the e2e-*.sh scripts
https://github.com/facebook/create-react-app/blob/next/appveyor.yml#L45

[gaearon]

Sorry, I got confused by description because I thought it's only relevant to docker script. Never mind me 😛

[iansu]

Thanks for the info guys. Our tests have been a bit flakey lately so I just wanted to make sure we were in a good state after these changes.