Docs: migration from Hugo to Astro (#41251)

Co-authored-by: HiDeoo <494699+HiDeoo@users.noreply.github.com>
Co-authored-by: Mark Otto <markdotto@gmail.com>

site/src/env.d.ts

@@ -0,0 +1,10 @@
+/// <reference path="../.astro/types.d.ts" />
+/// <reference types="astro/client" />
+
+interface ImportMetaEnv {
+  readonly NETLIFY?: string
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv
+}