Update to 2.1.0 from 2.0.8 fails

[ddeimeke]

Issue details

Please provide issue details here.
Remember, this is not a place to ask questions. For that, go to http://gitter.im/wallabag/wallabag.

Environment

• wallabag version (or git revision) that exhibits the issue: 2.1.0
• How did you install wallabag? Via git clone or by downloading the package? git clone
• Last wallabag version that did not exhibit the issue (if applicable): 2.0.8
• php version: 5.6.26
• OS: CentOS 7 (recent patch level)
• type of hosting (shared or dedicated): dedicated
• which storage system you choose at install (SQLite, MySQL/MariaDB or PostgreSQL):

Steps to reproduce/test case

ASSETS=build  ./install.sh

Installing PHP dependencies through Composer...
Do not run Composer as root/super user! See https://getcomposer.org/root for details 
Loading composer repositories with package information 
Updating dependencies (including require-dev) 
Nothing to install or update Writing lock file Generating autoload files

> Incenteev\ParameterHandler\ScriptHandler::buildParameters
Updating the "app/config/parameters.yml" file
> Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::buildBootstrap 
> Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::clearCache

 // Clearing the cache for the dev environment with debug true                                                          

 [OK] Cache for the "dev" environment (debug=true) was successfully cleared.                                            

> Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::installRequirementsFile
> Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::prepareDeploymentTarget
Downloading librairies through npm...
vendor/mouf/nodejs-installer/bin/local/npm: line 7: npm: command not found
Concat, minify and installing assets...
./install.sh: line 12: node_modules/grunt/bin/grunt: No such file or directory

[LeBrad]

I'm able to reproduce the issue in Debian Jessie.

[nicosomb]

You need to install npm before installing wallabag. We made a mistake here, sorry for that.

[ddeimeke]

There are more errors coming.

Running "copy:pickerjs" (copy) task
Warning: Unable to create directory "/srv/www/wallabag.deimeke.net/web/bundles/wallabagcore" (Error 
code: EEXIST). Use --force to continue.

I removed the stale link.

Running "postcss:material" (postcss) task
Warning: Promise is not defined Use --force to continue.

Aborted due to warnings.

No idea what to do.

[PoGo606]

I've got the same problem with Promise after uprading from 2.0.8.