code: Manifest createBootJarManifest() {
          Manifest manifest = new Manifest();
  
          Attributes manifestAttributes = manifest.getMainAttributes();
          manifestAttributes.putValue(Attributes.Name.MANIFEST_VERSION.toString(), "1.0");
          manifestAttributes.putValue("Created-By", "Liberty Monitoring Extender");
          manifestAttributes.putValue("Created-Time", DateFormat.getInstance().format(new Date()));
          manifestAttributes.putValue(MONITORING_VERSION_MANIFEST_HEADER, getCurrentVersion());
  
          return manifest;
      }
docs: Create the {@code Manifest} for the boot proxy jar.
  
  @return the boot proxy jar {@code Manifest}