public static String getImage(ServiceSpec serviceSpec) throws HyscaleException {
        if (serviceSpec == null) {
            return null;
        }
        return getImage(serviceSpec.get(HyscaleSpecFields.image, Image.class));
    }
Get complete image name from service spec

@param serviceSpec
@return image complete name
registry url + "/" + imageName:tag
1. registry url is null - imageName:tag
2. registry url and tag not present - imageName
@throws HyscaleException
service-spec/service-spec-commons/src/main/java/io/hyscale/servicespec/commons/util/ImageUtil.java