node {
    registry_url = 'https://my.registry.com/'
}
pipeline {
    agent any
    tools {
        nodejs 'Node6'
    }

    stages {
        stage('Build') {
            steps {
                 withNPM(npmrcConfig: '1aa61c52-21e9-488c-a989-4ca4bc7baac3') {
                    sh '''
                        npm install --silent
                        npm run dist
                    '''
                }
            }
        }
        stage('Dockerize') {
            steps {
                // This fails with the error shown in next code block
                docker.withRegistry("${registry_url}", 'my-login-credential') {
                    def customerUi = docker.build "omnius-vnext-customer-ui:${env.BUILD_TAG}"
                    customerUi.push
                }
            }
        }
}

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
WorkflowScript: 30: Method calls on objects not allowed outside "script" blocks. @ line 30, column 17.
                   docker.withRegistry("${registry_url}", 'Nexus') {
                   ^

WorkflowScript: 30: "error" should have 1 arguments but has 3 arguments instead. @ line 30, column 17.
                   docker.withRegistry("${registry_url}", 'Nexus') {
                   ^

2 errors

	at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310)
	at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1073)
	at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:591)
	at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:569)
	at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:546)
	at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298)
	at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268)
	at groovy.lang.GroovyShell.parseClass(GroovyShell.java:688)
	at groovy.lang.GroovyShell.parse(GroovyShell.java:700)
	at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.reparse(CpsGroovyShell.java:67)
	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.parseScript(CpsFlowExecution.java:430)
	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.start(CpsFlowExecution.java:393)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:238)
	at hudson.model.ResourceController.execute(ResourceController.java:98)
	at hudson.model.Executor.run(Executor.java:405)