Jenkins optimizations

Jenkinsfile

@@ -44,14 +44,14 @@ pipeline {
                 echo "Committer: ${env.GIT_COMMITTER_EMAIL}"
             }
         }
-        stage('Build') {
+        stage('Install') {
+            environment {
+                NODE_ENV = ""
+            }
             steps {
                 nodejs('node-lts') {
-                    withEnv(['NODE_ENV=']) {
-                        sh 'npm install --no-audit'
-                        sh 'gulp install'
-                    }
-                    sh 'gulp build'
+                    sh 'npm install --no-audit'
+                    sh 'gulp install'
                 }
             }
         }
@@ -79,6 +79,10 @@ pipeline {
                 CREDS = credentials('docker-registry')
             }
             steps {
+                nodejs('node-lts') {
+                    sh 'gulp build'
+                }
+
                 sh 'docker login --username $CREDS_USR --password $CREDS_PSW $REGISTRY'
                 sh 'docker-compose build --parallel'
                 sh 'docker-compose push'