add build and test django in Jenkinsfile

Jenkinsfile

@@ -1,18 +1,17 @@
 pipeline {
-    agent any
+    agent { docker { image 'python:3.7.2' } }
 
     stages {
-        stage('Build') {
+        stage('Build and test') {
             steps {
-                sh 'cd rest-app'
+                sh 'pwd'
-                sh 'pip3 install -r requirements.txt'
+                sh 'ls'
+                dir("${env.WORKSPACE}/rest-app"){
+                    sh 'pwd'
+                    sh 'ls'
+                    sh 'python3 -m venv venv && . venv/bin/activate && pip3 install -r requirements.txt && python3 manage.py migrate && python3 manage.py test'
                 }
             }
-        stage('Test') {
-            steps {
-                sh 'cd rest-app'
-                sh 'python3 manage.py test'
-            }
         }
     }
 }