fix build, maybe

Dockerfile

@@ -15,4 +15,5 @@ WORKDIR /app
 
 COPY --from=builder /app/build ./
 
+EXPOSE 3000
 CMD ["node", "./"]

Jenkinsfile

@@ -7,13 +7,6 @@ pipeline {
   }
 
   stages {
-    stage('Build') {
-      steps {
-        sh 'npm ci'
-        sh 'npm run build'
-      }
-    }
-
     stage('Docker Build') {
       steps {
         script {