Vendor opencode source for docker build

opencode/packages/web/src/content.config.ts

@@ -0,0 +1,7 @@
+import { defineCollection } from "astro:content"
+import { docsLoader } from "@astrojs/starlight/loaders"
+import { docsSchema } from "@astrojs/starlight/schema"
+
+export const collections = {
+  docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
+}