tested with gatsby-theme-codebushi 1.1.0

.node-version

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+16.13.0

README.md

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 # Gatsby Lander
 
-This is an experimental starter built using [gatsby-theme-codebushi](https://github.com/codebushi/gatsby-theme-codebushi), a theme which uses [Tailwind CSS](https://tailwindcss.com/).
+This is a sample starter built with
 
-Check out https://codebushi.com/gatsby-starters-and-themes/ for more Gatsby starters and templates.
+* [gatsby-theme-codebushi](https://github.com/codebushi/gatsby-theme-codebushi)
+* [Tailwind CSS](https://tailwindcss.com/)
+
+[Codebushi](https://codebushi.com/gatsby-starters-and-themes/) has even more
+Gatsby starters and templates.
 
 ## Preview
 
-https://gatsby-lander.surge.sh/
+[https://gatsby-lander.surge.sh/](https://gatsby-lander.surge.sh/)
 
 ## Installation
 
 Install this starter (assuming Gatsby is installed) by running from your CLI:
-<br/>
-`gatsby new gatsby-starter-lander https://github.com/codebushi/gatsby-starter-lander`
-
-Run `gatsby develop` in the terminal to start the dev site.
 
-## Notes
+```bash
+gatsby new gatsby-starter-lander https://github.com/codebushi/gatsby-starter-lander
+```
 
-These libraries do not yet fully support the upgrade to Gatsby 3.x:
-* gatsby-plugin-react-helmet
-* gatsby-plugin-emotion
-* gatsby-plugin-postcss
-* gatsby-theme-codebushi
+Run `gatsby develop` in the terminal to start the dev site.