Propose an explanation how to restart gracefully gitea after an update

docs/content/doc/installation/from-binary.en-us.md

@@ -122,6 +122,10 @@ It is recommended you do a [backup]({{< relref "doc/usage/backup-and-restore.en-
 If you have carried out the installation steps as described above, the binary should
 have the generic name `gitea`. Do not change this, i.e. to include the version number.
 
+To restart your gitea instance, we recommand to use if you know your gitea PID ```kill -1 $GITEA_PID``` otherwise you can use ```killall -1 gitea``` or ```pkill -1 gitea```
+
+Note : We don't recommand to use SIGKILL signal, you could broke some gitea behaviors as it will not gracefully stop (task in queue, indexers processes, ...)
+
 See below for troubleshooting instructions to repair broken repositories after
 an update of your Gitea version.