Add Jenkinsfile

Dockerfile.build

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+FROM ubuntu:focal
+
+RUN apt-get update && apt-get install -y docker.io

Jenkinsfile

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+pipeline {
+    agent {
+        dockerfile {
+            filename 'Dockerfile.build'
+            args '-v /var/run/docker.sock:/var/run/docker.sock'
+        }
+    }
+    stages {
+        stage('Install QEMU') {
+            steps {
+                sh 'docker run --rm --privileged multiarch/qemu-user-static --reset -p yes'
+            }
+        }
+        stage('Build') {
+            steps {
+                sh './build.sh'
+            }
+        }
+        stage('Publish') {
+            steps {
+                withCredentials([usernamePassword(credentialsId: 'docker_hub_login', usernameVariable: 'DOCKER_HUB_USERNAME', passwordVariable: 'DOCKER_HUB_PASSWORD')]) {
+                    sh 'docker login -u "${DOCKER_HUB_USERNAME}" -p "${DOCKER_HUB_PASSWORD}"'
+                }
+                sh 'docker push thebrokenrail/minecraft-pi'
+            }
+        }
+    }
+}