Check out https://codebushi.com/gatsby-starters-and-themes/ for more Gatsby starters and templates.
Install this starter (assuming Gatsby is installed) by running from your CLI:
gatsby new gatsby-starter-lander https://github.com/codebushi/gatsby-starter-lander
gatsby develop in the terminal to start the dev site.
These libraries do not yet fully support the upgrade to Gatsby 3.x: