bower install allow-root

[tembi4-84]

--allow-root for bower installation to prevent fails inside Docker containers

[CLAassistant]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ johndevs
❌ ArtemPopenkov
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[johndevs]

Hi @tembi4-84 ,

I updated your PR with the latest changes for master.

If you could sign the CLA (by clicking on the details link) then I can merge this into the master branch.

[tembi4-84]

Hi @johndevs, I had signed it (You have signed the CLA for devsoap/gradle-vaadin-flow
Version: 2018-09-14), but in the PR it still says "NOT signed"...

[tembi4-84]

@johndevs

[johndevs]

This is strange. I'll rebase the change and see if it would make a difference.

It can also be that if you are using multiple Github accounts that somehow the signature was given with the wrong account (cla-assistant/cla-assistant#241). In that case try to sign it again using another browser window where you haven't signed in to Github before.