Add embedded favicon support with default fallback

- Used `embed` to include a default favicon.
- Implemented handler to serve `favicon.ico`, falling back to the embedded default if not found.

go.sum

@@ -6,8 +6,6 @@ github.com/mattn/go-colorable v0.1.14 h1:9A9LHSqF/7dyVVX6g0U9cwm9pG3kP9gSzcuIPHP
 github.com/mattn/go-colorable v0.1.14/go.mod h1:6LmQG8QLFO4G5z1gPvYEzlUgJ2wF+stgPZH1UqBm1s8=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
-github.com/mleku/lol v1.0.1 h1:CMGpeMTh2iE7Xc4/dtJxs0vZqwRmPiGxsqpWxdmOZKc=
-github.com/mleku/lol v1.0.1/go.mod h1:daW3rL0XP4ZKscvWn990AJCrJs2Lsu+sdrI9cWbacWE=
 go-simpler.org/env v0.12.0 h1:kt/lBts0J1kjWJAnB740goNdvwNxt5emhYngL0Fzufs=
 go-simpler.org/env v0.12.0/go.mod h1:cc/5Md9JCUM7LVLtN0HYjPTDcI3Q8TDaPlNTAlDU+WI=
 golang.org/x/crypto v0.41.0 h1:WKYxWedPGCTVVl5+WHSSrOBT0O8lx32+zxmHxijgXp4=
@@ -21,3 +19,5 @@ golang.org/x/sys v0.35.0 h1:vz1N37gP5bs89s7He8XuIYXpyY0+QlsKmzipCbUtyxI=
 golang.org/x/sys v0.35.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
 golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
+lol.mleku.dev v1.0.2 h1:bSV1hHnkmt1hq+9nSvRwN6wgcI7itbM3XRZ4dMB438c=
+lol.mleku.dev v1.0.2/go.mod h1:DQ0WnmkntA9dPLCXgvtIgYt5G0HSqx3wSTLolHgWeLA=

main.go

@@ -6,6 +6,7 @@ import (
 	"bufio"
 	"context"
 	"crypto/tls"
+	_ "embed"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -31,8 +32,10 @@ import (
 	"lol.mleku.dev/log"
 )
 
-func main() {
+//go:embed favicon.ico
+var defaultFavicon []byte
 
+func main() {
 	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
 	defer cancel()
 	if err := run(ctx); err != nil {
@@ -448,6 +451,20 @@ func setProxy(mapping map[string]string) (http.Handler, error) {
 				if err := NostrDNS(hn, ba, mux); err != nil {
 					continue
 				}
+				fin := hn + "/favicon.ico"
+				var fi []byte
+				var err error
+				if fi, err = os.ReadFile(fin); !chk.E(err) {
+					fi = defaultFavicon
+				}
+				mux.HandleFunc(
+					hn+"/favicon.ico",
+					func(writer http.ResponseWriter, request *http.Request) {
+						if _, err = writer.Write(fi); chk.E(err) {
+							return
+						}
+					},
+				)
 				continue
 			}
 		} else if u, err := url.Parse(ba); err == nil {