fix: cleanup after rebase

env/schema.mjs

@@ -10,11 +10,11 @@ export const serverSchema = z.object({
   CMS_API_KEY: z.string(),
   CMS_ENVIRONMENT: z.enum(["development", "production", "staging", "test"]),
   CMS_URL: z.string(),
-  CMS_PREVIEW_URL: z.string().optional(),
-  CMS_PREVIEW_TOKEN: z.string().optional(),
+  CMS_PREVIEW_URL: z.string(),
+  CMS_PREVIEW_TOKEN: z.string(),
   NODE_ENV: z.enum(["development", "test", "production"]),
   PRINT_QUERY: z.boolean().default(false),
-});
+})
 
 /**
  * You can't destruct `process.env` as a regular object in the Next.js