fix build error

app/layout.tsx

@@ -1,5 +1,3 @@
-import '@/lib/env.server' // startup env var check
-
 import './globals.css'
 import { Inter } from 'next/font/google'
 import { DM_Sans } from 'next/font/google'

instrumentation.ts

@@ -0,0 +1,7 @@
+import { init } from '@/lib/env.server' // startup env var check
+
+export function register() {
+	if (typeof window === "undefined") {
+		init()
+	}
+}

lib/env.server.ts

@@ -12,20 +12,22 @@ declare global {
   }
 }
 
-try {
-  zodEnv.parse(process.env)
-} catch (err) {
-  if (err instanceof z.ZodError) {
-    const { fieldErrors } = err.flatten()
-    const errorMessage = Object.entries(fieldErrors)
-      .map(([field, errors]) =>
-        errors ? `${field}: ${errors.join(", ")}` : field,
+export function init() {
+  try {
+    zodEnv.parse(process.env)
+  } catch (err) {
+    if (err instanceof z.ZodError) {
+      const { fieldErrors } = err.flatten()
+      const errorMessage = Object.entries(fieldErrors)
+        .map(([field, errors]) =>
+          errors ? `${field}: ${errors.join(", ")}` : field,
+        )
+        .join("\n ")
+
+      console.error(
+        `Missing environment variables:\n ${errorMessage}`,
       )
-      .join("\n ")
-
-    console.error(
-      `Missing environment variables:\n ${errorMessage}`,
-    )
-    process.exit(1)
+      process.exit(1)
+    }
   }
-}
+}