code: @Nonnull
    public final JettyStarter setResourceBase (@Nonnull @Nonempty final String sResourceBase)
    {
      ValueEnforcer.notEmpty (sResourceBase, "ResourceBase");
      return setResourceBase (_asRes (sResourceBase));
    }
docs: Set the common resource base (directory) from which all web application
  resources will be loaded (servlet context root).
  
  @param sResourceBase
  The path. May neither be <code>null</code> nor empty.
  @return this for chaining