Jenkins (#1)

* add jenkins

* jslint -> eshint

* eshint -> eslint

Jenkinsfile

@@ -0,0 +1,34 @@
+pipeline {
+  agent {
+    docker {
+      image 'node'
+    }
+
+  }
+  stages {
+    stage('yarn install') {
+      steps {
+        sh 'yarn install --pure-lockfile --ignore-engines'
+      }
+    }
+    stage('Tests') {
+      parallel {
+        stage('eslint') {
+          steps {
+            sh 'yarn run eslint'
+          }
+        }
+        stage('webext_lint') {
+          steps {
+            sh 'yarn run webext_lint'
+          }
+        }
+        stage('htmllint') {
+          steps {
+            sh 'yarn run htmllint'
+          }
+        }
+      }
+    }
+  }
+}