changed jenkinsfile to use docker

Jenkinsfile

 pipeline {
+    agent none
+    stages {
+        stage('Build java-code') {
             agent any
             tools {
-      // Install the Maven version configured as "M3" and add it to the path.
                 maven "maven-3.6.2"
                 jdk "openjdk-11"
             }
-
-   stages {
-      stage('Build') {
             steps {
-                echo 'Building'
                 git branch: 'DRIP_3.0', url: 'https://github.com/skoulouzis/DRIP.git'
                 sh "mvn -Dmaven.test.skip=true install"    
-                sh "cd drip-planner && python3.7 -m venv venv && venv/bin/pip3 install -r requirements.txt"   
+            }
+        }
+        stage('Build python-code') {
+            agent {
+                docker { image 'python:3.7-buster' }
+            }
+            steps {
+                sh 'cd drip-planner && python3.7 -m venv venv && venv/bin/pip3 install -r requirements.txt'
                 sh "cd ../"
                 sh "cd sure_tosca-flask-server && python3.7 -m venv venv && venv/bin/pip3 install -r requirements.txt && venv/bin/pip3 install -r test-requirements.txt" 
-                sh "pwd && ls"
             }
         }
-      stage('Test') {
+        stage('Test java-code') {
+            agent any
+            tools {
+                maven "maven-3.6.2"
+                jdk "openjdk-11"
+            }
             steps {
-              echo 'Testing'
                 sh "mvn test"
+            }
+        }     
+        stage('Test python-code') {
+            agent {
+                docker { image 'python:3.7-buster' }
+            }
+            steps {
                 sh "cd drip-planner && venv/bin/python3.7 -m unittest discover"   
                 sh "cd sure_tosca-flask-server && venv/bin/python3.7 -m unittest discover"   
             }
         }  
-        stage('Package') {
+        stage('Package java-code') {
+            agent any
+            tools {
+                maven "maven-3.6.2"
+                jdk "openjdk-11"
+            }
             steps {
-                echo 'Deploying'
                 sh "cd drip-manager && mvn -Dmaven.test.skip=true install dockerfile:build"   
-                sh "cd ../"
-                sh "cd sure_tosca-flask-server && docker build -t sure-tosca:3.0.0 ."
-                sh "cd ../"
-                sh "cd drip-planner && docker build -t drip-planner:3.0.0 ."
-                
             }
         }    
-        stage('Deploy') {
+        stage('Package python-code') {
+            agent any
             steps {
-                echo 'Deploying'
-                
+                sh "cd sure_tosca-flask-server && docker build -t sure-tosca:3.0.0 ."
+                sh "cd ../"
+                sh "cd drip-planner && docker build -t drip-planner:3.0.0 ."
             }
         }     
     }

drip-planner/.idea/workspace.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="e478ccae-5352-4e8e-9efb-3f5cda44e877" name="Default Changelist" comment="">
-      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-    </list>
+    <list default="true" id="e478ccae-5352-4e8e-9efb-3f5cda44e877" name="Default Changelist" comment="" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />

jenkins_pipeline

-pipeline {
-   agent any
-   tools {
-      // Install the Maven version configured as "M3" and add it to the path.
-      maven "maven-3.6.2"
-      jdk "openjdk-11"
-   }
-
-   stages {
-      stage('Build') {
-            steps {
-                echo 'Building'
-                git branch: 'DRIP_3.0', url: 'https://github.com/skoulouzis/DRIP.git'
-                sh "mvn -Dmaven.test.skip=true install"    
-                sh "cd drip-planner && python3 -m venv venv && venv/bin/pip3 install -r requirements.txt"   
-                sh "cd ../"
-                sh "cd sure_tosca-flask-server && python3 -m venv venv && venv/bin/pip3 install -r requirements.txt && venv/bin/pip3 install -r test-requirements.txt"   
-                sh "pwd && ls"
-        }
-      }
-      stage('Test') {
-          steps {
-              echo 'Testing'
-              //sh "mvn test"
-              //sh "cd drip-planner && venv/bin/python3 -m unittest discover"   
-              //sh "cd sure_tosca-flask-server && venv/bin/python3 -m unittest discover"   
-          }
-        }
-        stage('Package') {
-            steps {
-                echo 'Deploying'
-                sh "cd drip-manager && mvn -Dmaven.test.skip=true install dockerfile:build"
-                
-            }
-        }             
-        stage('Deploy') {
-            steps {
-                echo 'Deploying'
-                
-            }
-        }        
-   }
-}

sure_tosca-flask-server/Dockerfile

-FROM python:3.7-alpine
+FROM python:3.7-buster
 
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app