Add a Jenkinsfile pipeline from source to deploy

Jenkinsfile

+pipeline {
+  agent {label 'debian_stretch'}
+  stages {
+    stage('lint') {
+      parallel {
+        stage('flake8') {
+          steps {
+            sh "tox -e flake8"
+          }
+        }
+        stage('check-manifest') {
+          steps {
+            sh "tox -e check-manifest"
+          }
+        }
+      }
+    }
+    stage('tests') {
+      steps {
+        sh "tox -e py3"
+      }
+    }
+    stage('deploy') {
+      when {
+        environment name: 'DEPLOY', value: 'true'
+      }
+      agent {label 'docker-host'}
+      steps {
+        sh "make deploy"
+      }
+    }
+  }
+}