Added Jenkinsfile

Jenkinsfile

@@ -0,0 +1,15 @@
+node {    
+      environment{
+            IMAGENAME = "agreiner/advancedmqttbridge"
+            DOCKER_CLI_EXPERIMENTAL=enabled
+      }
+
+      stage('Clone repository') {               
+            checkout scm    
+      }
+      stage('Build and push multiarch image') {
+            sh """
+                  docker buildx build -t reg.greinet.com/agreiner/advancedmqttbridge:latest --platform linux/amd64,linux/arm64 --push .
+            """
+       }
+}