Added Dockerfile

Dockerfile

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+FROM python:3
+RUN pip install django==3.2
+
+COPY . .
+RUN python manage.py makemigrations
+RUN python manage.py migrate
+EXPOSE 8000
+CMD ["python","manange.py","runserver",0.0.0.0:8000]

Jenkinsfile

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+pipeline {
+    agent any
+
+    environment {
+        IMAGE_TAG="${BUILD_NUMBER}"
+    }
+
+    stages {
+        stage('Code') {
+            steps {
+                 git url:'https://github.com/himanshurkt96/django-todo-python.git', branch:'develop'
+            }
+        }
+
+        stage('Build') {
+            steps {
+                sh 'docker build . -t himanshurkt96/cicd-todo:${BUILD_NUMBER}'
+            }
+        }
+
+        stage('Push') {
+            steps {
+                withCredentials([usernamePassword(credentialsId: 'dockerHub', passwordVariable: 'dockerHubPassword', usernameVariable: 'dockerHubUser')]) {
+                    sh "docker login -u ${env.dockerHubUser} -p ${env.dockerHubPassword}"
+
+                    sh 'docker push himanshurkt96/cicd-todo:${BUILD_NUMBER}'
+                }
+            }
+        }
+
+    }
+
+}