fix: check window in swetrix component

Author: ndom91

src/components/analytics.jsx

@@ -7,7 +7,10 @@ import { usePathname } from 'next/navigation'
 function SwetrixComponent() {
   const pathname = usePathname()
 
-  if (window.location.host === 'briefkastenhq.com') {
+  if (
+    typeof window !== 'undefined' &&
+    window.location.host === 'briefkastenhq.com'
+  ) {
     Swetrix.init(process.env.NEXT_PUBLIC_SWETRIX_PROJECT, {
       apiURL: process.env.NEXT_PUBLIC_SWETRIX_API_HOST,
     })