Add a Jenkinsfile for web app docker build and push

Jenkinsfile

@@ -0,0 +1,41 @@
+pipeline {
+  agent any
+
+  options {
+    // Configure an overall timeout for the build.
+    timeout(time: 1, unit: 'HOURS')
+    disableConcurrentBuilds()
+  }
+
+  stages {
+    stage('Deliver web Docker image') {
+      when {
+        anyOf {
+          branch 'master'
+          branch 'release'
+          buildingTag()
+        }
+      }
+      steps {
+        script {
+          env.DOCKER_TAG = 'master'
+          if (env.TAG_NAME) {
+            env.DOCKER_TAG = env.TAG_NAME
+          } else {
+            env.DOCKER_TAG = env.BRANCH_NAME
+          }
+
+          echo "Docker tag: ${env.DOCKER_TAG}"
+
+          // Build image
+          sh "docker build -t linagora/tmail-web:${env.DOCKER_TAG} ."
+
+          def webImage = docker.image "linagora/tmail-web:${env.DOCKER_TAG}"
+          docker.withRegistry('', 'dockerHub') {
+            webImage.push()
+          }
+        }
+      }
+    }
+  }
+}