Migrate docs site to Vercel (#795)

Co-authored-by: Tony Sullivan <[email protected]>

.gitignore

@@ -16,3 +16,6 @@ pnpm-debug.log*
 
 # Vitest
 __coverage__/
+
+# Vercel output
+.vercel

docs/astro.config.mjs

@@ -16,7 +16,13 @@ export const locales = {
 	ru: { label: 'Русский', lang: 'ru' },
 };
 
-const site = 'https://starlight.astro.build/';
+/* https://vercel.com/docs/projects/environment-variables/system-environment-variables#system-environment-variables */
+const VERCEL_PREVIEW_SITE =
+	process.env.VERCEL_ENV !== 'production' &&
+	process.env.VERCEL_URL &&
+	`https://${process.env.VERCEL_URL}`;
+
+const site = VERCEL_PREVIEW_SITE || 'https://starlight.astro.build/';
 
 export default defineConfig({
 	site,
@@ -175,7 +181,6 @@ export default defineConfig({
 					autogenerate: { directory: 'reference' },
 				},
 			],
-			lastUpdated: true,
 		}),
 	],
 });

docs/vercel.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "https://openapi.vercel.sh/vercel.json",
+
+  "routes": [
+    {
+      "src": "^/_astro/(.*)$",
+      "headers": { "cache-control": "public, max-age=31536000, immutable" },
+      "continue": true
+    },
+
+    { "src": "/(ph$|ph/)(.*)", "dest": "https://astro-houston-ph.pages.dev/ph/$2" },
+
+    { "src": "(.*)/([^./]+)$", "dest": "$1/$2/", "status": 301 },
+    { "src": "(.*)/index.html$", "dest": "$1/", "status": 301 },
+
+    { "handle": "filesystem" },
+
+    { "src": "/zh/(.*)", "dest": "/zh-cn/$1", "status": 301 },
+
+    { "src": "/(?<lang>[^/]*)/(.*)", "dest": "/$lang/404/", "status": 404 }
+  ]
+}