Jenkins: use Docker

Change-Id: Id7acbd8e217fc55668c8d1943f0464308fce62bc
diff --git a/Jenkinsfile b/Jenkinsfile
index aac02ad..6a41bc1 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -4,7 +4,10 @@
     stages {
         stage('Build') {
             steps {
-                sh 'mkdir build && cd build && cmake .. && make'
+                script {
+                    docker.build("dhtnet:${env.BUILD_ID}", "--target build .")
+                    sh "docker run -t --rm dhtnet:${env.BUILD_ID}"
+                }
             }
         }
     }