Add log when there are no galleries

boop.py

@@ -242,6 +242,7 @@ def main():
     pictures_folder = os.path.join(os.curdir, PICTURES_DIR_NAME)
     galleries = list(list_galleries_in(pictures_folder))
     if len(galleries) == 0:
+        print(f"No galleries found in {pictures_folder}")
         return
     galleries.sort(key=itemgetter("name"))
     print(f"{len(galleries)} galleries found.")