Fix adapter-node regression (#1756)

Author: Conduitry

.changeset/chilled-kiwis-drop.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-node': patch
+---
+
+Fix regression caused by writing `env.js` to the wrong path

packages/adapter-node/index.js

@@ -43,7 +43,7 @@ export default function ({
 			const files = fileURLToPath(new URL('./files', import.meta.url));
 			utils.copy(files, '.svelte-kit/node');
 			writeFileSync(
-				join(files, 'env.js'),
+				'.svelte-kit/node/env.js',
 				`export const host = process.env[${JSON.stringify(
 					host_env
 				)}] || '0.0.0.0';\nexport const port = process.env[${JSON.stringify(port_env)}] || 3000;`