Make CircleCI use node@8 and npm @5

[etpinard]

Both set to become LTS, now available on CircleCI - see https://circleci.com/blog/npm5-and-nodejs8/

[etpinard]

Actually, node@8 (with npm@5) isn't available on CircleCI's preinstalled images yet. See

https://circleci.com/docs/1.0/build-image-trusty/#nodejs

for most up-to-date list.

[etpinard]

While doing this, it might be worth migrating to CircleCI 2.0:

https://circleci.com/docs/2.0/migrating-from-1-2/

[etpinard]

cc https://github.com/plotly/streambed/pull/9973

[bpostlethwaite]

fyi node-usb/node-usb#193 (comment)
and I'm seeing these errors building plotly.js

 npm install
npm ERR! code 128
npm ERR! Command failed: /usr/bin/git clone -q git://github.com/mapbox/mapbox-gl-shaders.git /root/.npm/_cacache/tmp/git-clone-d8de79a2
npm ERR! fatal: could not create leading directories of '/root/.npm/_cacache/tmp/git-clone-d8de79a2': Permission denied
npm ERR! 

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2017-08-29T20_24_01_459Z-debug.log
root@stage-streambed-fl6p:/var/www/streambed# rm -r /root/.npm
root@stage-streambed-fl6p:/var/www/streambed# npm install
npm ERR! code 128
npm ERR! Command failed: /usr/bin/git clone -q git://github.com/mapbox/mapbox-gl-shaders.git /root/.npm/_cacache/tmp/git-clone-146d42f8
npm ERR! fatal: could not create leading directories of '/root/.npm/_cacache/tmp/git-clone-146d42f8': Permission denied
npm ERR! 

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2017-08-29T20_24_15_797Z-debug.log

[bpostlethwaite]

sorry npm issue link here: npm/npm#16898

[etpinard]

#1745 (comment)

Bumping to npm@5.0.3 should solve this.

[bpostlethwaite]

root@stage-streambed-fl6p:/var/www/streambed# npm --version
5.3.0

[bpostlethwaite]

tried obliterating /root/.npm but having the same error. Will post here once I find some workaround

[etpinard]

Some preliminary work on branch:

https://github.com/plotly/plotly.js/compare/circle2

Docker handlers have change significantly from Circle 1 to 2.0, so I think I'll wait for #1972 to be completed before giving this another shot.

[etpinard]

Brutal:

• https://discuss.circleci.com/t/why-circleci-2-0-does-not-support-mounting-folders/11605
• https://circleci.com/docs/2.0/building-docker-images/#mounting-folders

[etpinard]

Ping. Node 8.x is now LTS.