public JavaContainerBuilder addResources(Path resourceFilesDirectory) throws IOException {
    return addResources(resourceFilesDirectory, path -> true);
  }
Adds the contents of a resources directory to the image.

@param resourceFilesDirectory the directory containing the project's resources
@return this
@throws IOException if adding the layer fails
jib-core/src/main/java/com/google/cloud/tools/jib/api/JavaContainerBuilder.java