public Builder setAdditionalTargetImageTags(Set<String> tags) {
      additionalTargetImageTags = ImmutableSet.copyOf(tags);
      return this;
    }
Sets the tags to tag the target image with (in addition to the tag in the target image
configuration image reference set via {@link #setTargetImageConfiguration}).

@param tags a set of tags
@return this
jib-core/src/main/java/com/google/cloud/tools/jib/configuration/BuildContext.java