Also clean agent 1

Jenkinsfile

@@ -8,7 +8,16 @@ pipeline {
     }
 
     stages {
-        stage('Clean docker images') {
+        stage('Clean docker images agent1') {
+            agent {
+                label 'agent1'
+            }
+            steps {
+                sh 'docker system prune -a -f'
+                sh 'docker network prune -f'
+            }
+        }
+        stage('Clean docker images agent2') {
             agent {
                 label 'agent2'
             }