build docker image for multi arch

Jenkinsfile

@@ -62,15 +62,36 @@ pipeline {
             }
         }
 
-        stage('Release Docker image') {
+        stage('Prepare Docker release') {
+            environment {
+                COMPOSER_HOME="${WORKSPACE}/.composer"
+                npm_config_cache="${WORKSPACE}/.npm"
+            }
+            agent {
+                dockerfile {
+                    filename 'docker/Dockerfile'
+                    dir '.'
+                    additionalBuildArgs '--target mapg_base'
+                    reuseNode true
+                }
+            }
             steps {
                 script {
                     sh script: 'git clean -ffdx', label: 'Clean repository'
-
                     env.VERSION = sh(script: 'git describe --tags --always --match "Release_*" HEAD', returnStdout: true).trim()
+                    sh script: 'docker/scripts/release.sh', label: 'Release script'
+                    sh script: "rm -rf ${env.COMPOSER_HOME} ${env.npm_config_cache}"
+                }
+            }
+        }
 
+        stage('Release Docker image') {
+            steps {
+                script {
                     withDockerRegistry([credentialsId: 'gitea-system-user', url: 'https://git.esoko.eu/']) {
+                        sh script: 'docker buildx create --use --bootstrap --platform=linux/arm64,linux/amd64 --name multi-platform-builder'
                         sh script: """docker buildx build \
+                                        --platform linux/amd64,linux/arm64 \
                                         -f docker/Dockerfile \
                                         --target mapg_release \
                                         -t git.esoko.eu/esoko/mapguesser:${env.VERSION} \