WIP nightly builds on jenkins

Dockerfile

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+FROM node:6.14.1
+
+RUN npm install -g web-ext
+
+ARG UID
+ARG GID
+RUN groupadd jenkins -g $GID \
+ && useradd -ms /bin/bash jenkins -u $UID -g $GID
+
+USER jenkins
+COPY package.json /home/jenkins/
+RUN cd /home/jenkins/ && npm install

Jenkinsfile

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+node('docker') {
+    stage ('Checkout') {
+        checkout scm
+    }
+
+    def img
+
+    stage('Build Docker Image') {
+        img = docker.build('ghostery/build', '--build-arg UID=`id -u` --build-arg GID=`id -g` .')
+    }
+
+    stage('Build Extension') {
+      img.inside() {
+        withCache {
+          // rerun postinstall for vendor-copy
+          sh 'npm run postinstall'
+          sh 'npm run build.prod'
+          sh 'web-ext build --overwrite-dest'
+        }
+      }
+    }
+
+    stage('Publish') {
+      withCredentials([[
+          $class: 'UsernamePasswordMultiBinding',
+          credentialsId: '06ec4a34-9d01-46df-9ff8-64c79eda8b14',
+          passwordVariable: 'AWS_SECRET_ACCESS_KEY',
+          usernameVariable: 'AWS_ACCESS_KEY_ID']]) {
+        sh 'aws s3 sync web-ext-artifacts/ s3://cdncliqz/update/ghostery/nightly_test/ --acl public-read'
+      }
+    }
+}
+
+def withCache(Closure body=null) {
+  def cleanCache = {
+    sh 'rm -fr node_modules'
+  }
+
+  try {
+    cleanCache()
+    // Main dependencies
+    sh 'cp -fr /home/jenkins/node_modules .'
+
+    body()
+  } finally {
+    cleanCache()
+  }
+}