text: CREATE TABLE dockerhub_images (
    dh_group TEXT,
    dh_name TEXT,
    PRIMARY KEY (dh_group, dh_name)
  );
  
  CREATE TABLE dockerhub_image_tags (
    dh_group TEXT,
    dh_name TEXT,
    tag_name TEXT,
    FOREIGN KEY (dh_group, dh_name) REFERENCES dockerhub_images(dh_group, dh_name),
    PRIMARY KEY (dh_group, dh_name, tag_name)
  );