Fix Jenkins

Dockerfile.build

@@ -1,3 +0,0 @@
-FROM ubuntu:focal
-
-RUN apt-get update && apt-get install -y docker.io

Jenkinsfile

@@ -1,18 +1,17 @@
 pipeline {
     agent {
         dockerfile {
-            filename 'Dockerfile.build'
-            args '-v /var/run/docker.sock:/var/run/docker.sock'
+            filename 'Dockerfile'
         }
     }
     stages {
         stage('Build') {
             steps {
-                sh 'DOCKER_BUILD_OPTIONS="--no-cache" ./run.sh'
+                sh './build-minetest.sh'
             }
             post {
                 success {
-                    archiveArtifacts artifacts: 'out/*.deb', fingerprint: true
+                    archiveArtifacts artifacts: '/out/*.deb', fingerprint: true
                 }
             }
         }