Clean up docker stuff on built in node every monday

.gitignore

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+*.swp

Jenkinsfile

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+pipeline {
+    agent built_in_node
+
+    triggers {
+        cron("59 23 * * 1") // Clean up every monday
+    }
+
+    options {
+        buildDiscarder(logRotator(numToKeepStr: '10', artifactNumToKeepStr: '10'))
+    }
+
+    stages {
+        stage('Clean docker images') {
+            steps {
+                sh 'docker system prune -a -f'
+                sh 'docker network prune -f'
+            }
+        }
+    }
+
+}
+