all: set the resolv.conf symlinked to systemd stub-resolv.conf

The default resolv.conf is empty.
This cause program that depends on resolv.conf for name resolution will
fail.

As a test, we create small Go program "cmd/golookup" that can lookup
IP address of host name using pure Go resolver (using/etc/resolv.conf).

1 files changed, 21 insertions, 0 deletions

diff --git a/cmd/golookup/main.go b/cmd/golookup/main.go
new file mode 100644
index 0000000..5649705
--- /dev/null
+++ b/cmd/golookup/main.go
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2026 M. Shulhan <ms@kilabit.info>
+
+// golookup program to test lookup for IP addresses using pure Go resolver
+// (using name server from /etc/resolv.conf, instead of nss APIs).
+package main
+
+import (
+	"fmt"
+	"log"
+	"net"
+	"os"
+)
+
+func main() {
+	addr, err := net.LookupHost(os.Args[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(addr)
+}