feat(debug): add debug package for custom debugging endpoints

app/services/thoughts-api/main.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/ardanlabs/conf/v3"
+	"github.com/youngjun827/thoughts/business/web/v1/debug"
 	"github.com/youngjun827/thoughts/foundation/logger"
 )
 
@@ -98,7 +99,7 @@ func run(ctx context.Context, log *logger.Logger) error {
 	go func() {
 		log.Info(ctx, "startup", "status", "debug v1 router started", "host", cfg.Web.DebugHost)
 
-		err := http.ListenAndServe(cfg.Web.DebugHost, http.DefaultServeMux)
+		err := http.ListenAndServe(cfg.Web.DebugHost, debug.Mux())
 		if err != nil {
 			log.Error(ctx, "shutdown", "status", "debug v1 router closed", "host", cfg.Web.DebugHost, "msg", err)
 		}

business/web/v1/debug/debug.go

@@ -0,0 +1,21 @@
+// Package debug provides handler support for the debugging endpoints.
+package debug
+
+import (
+	"expvar"
+	"net/http"
+	"net/http/pprof"
+)
+
+func Mux() *http.ServeMux {
+	mux := http.NewServeMux()
+
+	mux.HandleFunc("/debug/pprof/", pprof.Index)
+	mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
+	mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
+	mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
+	mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
+	mux.Handle("/debug/vars", expvar.Handler())
+
+	return mux
+}