code: public String generateDockerfileFor(Map<String, File> plugins) throws IOException {
          StringBuilder builder = new StringBuilder();
          builder.append("FROM scratch").append(NL)
                  .append("MAINTAINER Kanstantsin Shautsou <kanstantsin.sha@gmail.com>").append(NL)
                  .append("COPY ./ /").append(NL)
                  .append("VOLUME /usr/share/jenkins/ref").append(NL);
  
          for (Map.Entry<String, String> entry : generateLabels(plugins).entrySet()) {
              builder.append("LABEL ").append(entry.getKey()).append("=").append(entry.getValue()).append(NL);
          }
  
  //        newClientBuilderForConnector.append("LABEL GENERATION_UUID=").append(UUID.randomUUID()).append(NL);
  
          return builder.toString();
      }
docs: 'Dockerfile' as String based on sratch for placing plugins.