Still fixing

Jenkinsfile

@@ -32,7 +32,7 @@ pipeline {
   stages {
     stage('Initial Cleanup') {
        steps {
-          sh './gradlew clean'
+          sh 'GRADLE_USER_HOME=. && ./gradlew clean'
        }
     }
 

docker/Dockerfile

 FROM openjdk:13-jdk-alpine
 
-RUN apk update && \
+RUN echo "jenkins:x:2030:100:guest:/dev/null:/sbin/nologin" >> /etc/passwd && \
+    apk update && \
     apk add git openssh zip R bash