misc: adds option to enable pprof

.env.example

@@ -21,3 +21,4 @@ NO_PROXY=
 
 # misc
 REPO_URL=https://github.com/govdbot/govd
+PROFILER_PORT=0

README.md

@@ -32,6 +32,7 @@ sh build.sh
 ```
 
 ## installation with docker
+
 first build the image using the dockerfile
 
 ```bash
@@ -71,6 +72,7 @@ docker compose up -d
 | `HTTPS_PROXY`         | http proxy (optional)                           |                                        |
 | `NO_PROXY`            | no proxy domains (optional)                      |                                        |
 | `REPO_URL`            | project repository url                           | `https://github.com/govdbot/govd`      |
+| `PROFILER_PORT`       | port for profiler http server (pprof)              | `0` _(disabled)_                                    |
 
 **note:**
 to avoid limits on files, you should host your own telegram botapi. public bot instance is currently running under a botapi fork, [tdlight-telegram-bot-api](https://github.com/tdlight-team/tdlight-telegram-bot-api), but you can use the official botapi client too.

main.go

@@ -1,10 +1,16 @@
 package main
 
 import (
+	"fmt"
 	"govd/bot"
 	"govd/database"
 	"govd/util"
 	"log"
+	"net/http"
+	"os"
+	"strconv"
+
+	_ "net/http/pprof"
 
 	"github.com/joho/godotenv"
 )
@@ -14,6 +20,12 @@ func main() {
 	if err != nil {
 		log.Fatal("error loading .env file")
 	}
+	profilerPort, err := strconv.Atoi(os.Getenv("PROFILER_PORT"))
+	if err == nil && profilerPort > 0 {
+		go func() {
+			http.ListenAndServe(fmt.Sprintf("localhost:%d", profilerPort), nil)
+		}()
+	}
 	util.CleanupDownloadsDir()
 	util.StartDownloadsCleanup()
 	ok := util.CheckFFmpeg()