Attempt 3

_config.yml

@@ -5,7 +5,7 @@ theme: jekyll-theme-chirpy
 
 # Change the following value to '/PROJECT_NAME' ONLY IF your site type is GitHub Pages Project sites
 # and doesn't have a custom domain.
-baseurl: ""
+baseurl: "/blog"
 
 # The language of the webpage › http://www.lingoes.net/en/translator/langcode.htm
 # If it has the same name as one of the files in folder `_data/locales`, the layout language will also be changed,