Update favicon handling and bump version to v0.6.1

- main.go
  - Removed static favicon serving from `ServeMux`.
  - Removed import for `net/http`.

- pkg/version/version
  - Updated version from v0.6.0 to v0.6.1.

- cmd/lerproxy/main.go
  - Added embedded support for default favicon using `//go:embed`.
  - Modified logic to serve favicon as an embedded resource or from file in the same directory as the nostr.json

- static/favicon.ico
  - Deleted static favicon file.

- cmd/lerproxy/favicon.ico
  - Added new file for embedded favicon resource.

cmd/lerproxy/main.go

@@ -6,6 +6,7 @@ package main
 import (
 	"bufio"
 	"crypto/tls"
+	_ "embed"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -35,6 +36,9 @@ import (
 	"golang.org/x/sync/errgroup"
 )
 
+//go:embed favicon.ico
+var defaultFavicon []byte
+
 type runArgs struct {
 	Addr  string        `arg:"-l,--listen" default:":https" help:"address to listen at"`
 	Conf  string        `arg:"-m,--map" default:"mapping.txt" help:"file with host/backend mapping"`
@@ -322,6 +326,19 @@ func setProxy(mapping map[string]string) (h http.Handler, err error) {
 						fmt.Fprint(writer, nostrJSON)
 					},
 				)
+				fin := hn + "/favicon.ico"
+				var fi []byte
+				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 {

main.go

@@ -5,7 +5,6 @@ package main
 
 import (
 	"fmt"
-	"net/http"
 	_ "net/http/pprof"
 	"os"
 
@@ -78,14 +77,6 @@ func main() {
 	}
 	var opts []options.O
 	serveMux := servemux.NewServeMux()
-
-	// Add favicon handler
-	serveMux.HandleFunc("/favicon.ico", func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "image/x-icon")
-		w.Header().Set("Cache-Control", "public, max-age=86400") // Cache for 24 hours
-		http.ServeFile(w, r, "static/favicon.ico")
-	})
-
 	if server, err = relay.NewServer(
 		serverParams, serveMux, opts...,
 	); chk.E(err) {

pkg/version/version

@@ -1 +1 @@
-v0.6.0
+v0.6.1