fix(logs): Correctly format listener address (#162)

* fix: Correctly format listener address (https://github.com/TecharoHQ/anubis/issues/93)

Handle addresses that include a hostname, not just ports.  If
the address starts with a colon, assume it's just a port and
prefix it with "http://localhost".  Otherwise, prefix the
entire address with "http://".  This ensures that the listener
URL is correctly formatted regardless of whether it includes
a hostname or just a port.

Signed-off-by: Jason Cameron <git@jasoncameron.dev>

* chore(docs): add changelog entry

Signed-off-by: Jason Cameron <git@jasoncameron.dev>

---------

Signed-off-by: Jason Cameron <git@jasoncameron.dev>

cmd/anubis/main.go

@@ -17,6 +17,7 @@ import (
 	"os/signal"
 	"regexp"
 	"strconv"
+	"strings"
 	"sync"
 	"syscall"
 	"time"
@@ -82,7 +83,11 @@ func setupListener(network string, address string) (net.Listener, string) {
 	case "unix":
 		formattedAddress = "unix:" + address
 	case "tcp":
-		formattedAddress = "http://localhost" + address
+		if strings.HasPrefix(address, ":") { // assume it's just a port e.g. :4259
+			formattedAddress = "http://localhost" + address
+		} else {
+			formattedAddress = "http://" + address
+		}
 	default:
 		formattedAddress = fmt.Sprintf(`(%s) %s`, network, address)
 	}
@@ -245,10 +250,10 @@ func main() {
 	h = internal.XForwardedForToXRealIP(h)
 
 	srv := http.Server{Handler: h}
-	listener, url := setupListener(*bindNetwork, *bind)
+	listener, listenerUrl := setupListener(*bindNetwork, *bind)
 	slog.Info(
 		"listening",
-		"url", url,
+		"url", listenerUrl,
 		"difficulty", *challengeDifficulty,
 		"serveRobotsTXT", *robotsTxt,
 		"target", *target,