Pull request 1870: nextapi-frontend-fs

Merge in DNS/adguard-home from nextapi-frontend-fs to master

Squashed commit of the following:

commit 3ed959f21939cf5590c27426af46906cbffed502
Merge: e60bbdd04 9fda7bfd3
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Jun 13 13:37:00 2023 +0300

    Merge branch 'master' into nextapi-frontend-fs

commit e60bbdd04ce841c1aaaa198cc9dc85ae14799ffa
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Jun 9 14:53:09 2023 +0300

    next: support frontend fs

main_next.go

@@ -13,8 +13,8 @@ import (
 // outside of the same or underlying directory.
 
 //go:embed build
-var clientBuildFS embed.FS
+var frontend embed.FS
 
 func main() {
-	cmd.Main(clientBuildFS)
+	cmd.Main(frontend)
 }