Improve pprof doc (#20463)

Author: wxiaoguang

cmd/web.go

@@ -148,8 +148,9 @@ func runWeb(ctx *cli.Context) error {
 		go func() {
 			http.DefaultServeMux.Handle("/debug/fgprof", fgprof.Handler())
 			_, _, finished := process.GetManager().AddTypedContext(context.Background(), "Web: PProf Server", process.SystemProcessType, true)
+			// The pprof server is for debug purpose only, it shouldn't be exposed on public network. At the moment it's not worth to introduce a configurable option for it.
 			log.Info("Starting pprof server on localhost:6060")
-			log.Info("%v", http.ListenAndServe("localhost:6060", nil))
+			log.Info("Stopped pprof server: %v", http.ListenAndServe("localhost:6060", nil))
 			finished()
 		}()
 	}

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -300,7 +300,7 @@ The following configuration set `Content-Type: application/vnd.android.package-a
 - `APP_DATA_PATH`: **data** (**/data/gitea** on docker): Default path for application data.
 - `STATIC_CACHE_TIME`: **6h**: Web browser cache time for static resources on `custom/`, `public/` and all uploaded avatars. Note that this cache is disabled when `RUN_MODE` is "dev".
 - `ENABLE_GZIP`: **false**: Enable gzip compression for runtime-generated content, static resources excluded.
-- `ENABLE_PPROF`: **false**: Application profiling (memory and cpu). For "web" command it listens on localhost:6060. For "serv" command it dumps to disk at `PPROF_DATA_PATH` as `(cpuprofile|memprofile)_<username>_<temporary id>`
+- `ENABLE_PPROF`: **false**: Application profiling (memory and cpu). For "web" command it listens on `localhost:6060`. For "serv" command it dumps to disk at `PPROF_DATA_PATH` as `(cpuprofile|memprofile)_<username>_<temporary id>`
 - `PPROF_DATA_PATH`: **data/tmp/pprof**: `PPROF_DATA_PATH`, use an absolute path when you start Gitea as service
 - `LANDING_PAGE`: **home**: Landing page for unauthenticated users \[home, explore, organizations, login, **custom**\]. Where custom would instead be any URL such as "/org/repo" or even `https://anotherwebsite.com`
 - `LFS_START_SERVER`: **false**: Enables Git LFS support.

docs/content/doc/help/seek-help.en-us.md

@@ -44,12 +44,13 @@ menu:
     * This will greatly improve the chance that the root of the issue can be quickly discovered and resolved.
 5. If you meet slow/hanging/deadlock problems, please report the stack trace when the problem occurs:
     1. Enable pprof in `app.ini` and restart Gitea
-    ```
+    ```ini
     [server]
     ENABLE_PPROF = true
     ```
-    2. Trigger the bug, when Gitea gets stuck, use curl or browser to visit: `http://127.0.0.1:6060/debug/pprof/goroutine?debug=1` (IP is `127.0.0.1` and port is `6060`)
-    3. Report the output (the stack trace doesn't contain sensitive data)
+    2. Trigger the bug, when Gitea gets stuck, use curl or browser to visit: `http://127.0.0.1:6060/debug/pprof/goroutine?debug=1` (IP must be `127.0.0.1` and port must be `6060`). 
+    3. If you are using Docker, please use `docker exec -it <container-name> curl "http://127.0.0.1:6060/debug/pprof/goroutine?debug=1"`.
+    4. Report the output (the stack trace doesn't contain sensitive data)
 
 ## Bugs