feat(api): add pprof endpoint

This will help debug running go2rtc instances.

By default the pprof endpoint is off.
It can be enabled via the api.pprof setting.

internal/api/api.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"net/http/pprof"
 	"os"
 	"strconv"
 	"strings"
@@ -32,6 +33,7 @@ func Init() {
 			TLSCert    string `yaml:"tls_cert"`
 			TLSKey     string `yaml:"tls_key"`
 			UnixListen string `yaml:"unix_listen"`
+			Pprof      bool   `yaml:"pprof"`
 		} `yaml:"api"`
 	}
 
@@ -45,6 +47,9 @@ func Init() {
 		return
 	}
 
+	// overwrite default mux with new mux to avoid pprof auto registering
+	http.DefaultServeMux = http.NewServeMux()
+
 	basePath = cfg.Mod.BasePath
 	log = app.GetLogger("api")
 
@@ -56,6 +61,14 @@ func Init() {
 	HandleFunc("api/restart", restartHandler)
 	HandleFunc("api/log", logHandler)
 
+	if cfg.Mod.Pprof {
+		HandleFunc("/debug/pprof/", pprof.Index)
+		HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
+		HandleFunc("/debug/pprof/profile", pprof.Profile)
+		HandleFunc("/debug/pprof/symbol", pprof.Symbol)
+		HandleFunc("/debug/pprof/trace", pprof.Trace)
+	}
+
 	Handler = http.DefaultServeMux // 4th
 
 	if cfg.Mod.Origin == "*" {