My blog is using Astro along side Keystatic.
Install the dependencies with npm install
run the app with npm run dev
to access the CMS once the app is running go to localhost:4321/keystatic
You may need to add the below to your vs code settings
"prettier.documentSelectors": ["**/*.astro"],
"[astro]": {
"editor.defaultFormatter": "esbenp.prettier-vscode"
},