implemented missing semicolon

Jenkinsfile

@@ -126,6 +126,13 @@ spec:
                 }
             }
         }
+        stage('Docker check') {
+            steps {
+                container('custom-docker') {
+                    sh 'cat /etc/docker/daemon.json'
+                }
+            }
+        }
         stage('Docker build & push') {
             steps {
                 script {