use remote agent instead of ssh connection

Jenkinsfile

@@ -1,14 +1,5 @@
-def remote = [:]
-remote.name = 'workstation'
-remote.host = 'workstation'
-remote.user = 'dany'
-remote.identityFile = '/var/jenkins_home/.ssh/id_rsa'
-remote.allowAnyHosts = true
-remote.agent = false
-remote.logLevel = 'INFO'
-
 pipeline{
-  agent { node{ label'master' }}
+  agent { node{ label'workstation' }}
   options {
     // Limit build history with buildDiscarder option:
     // daysToKeepStr: history is only kept up to this many days.
@@ -29,10 +20,9 @@ pipeline{
   {
     stage('Build') {
       steps {
-        sshCommand remote: remote, command: '''
+        sh'''
         set -e
         set -x
-        export WORKSPACE=$(realpath "./jenkins/workspace/ci-image")
         cd $WORKSPACE
         # docker rmi -f $(docker images -f "dangling=true" -q)
         docker run --rm --privileged docker/binfmt:a7996909642ee92942dcd6cff44b9b95f08dad64