Update README with new version and update advices

README.markdown

@@ -22,13 +22,21 @@ From command line:
 
 `sudo yunohost app upgrade -u https://github.com/YunoHost-Apps/gogs_ynh gogs`
 
+Infos on upgrade from the old package version (gogs <0.9.xx)
+-------
+Previous versions of this package used to build gogs from sources instead of using precompiled binary. It also leave data to many places which was not good. The upgrade try to take care of moving everything to the right place **BUT, it's strongly advised to do a backup of your repositories and of the gogs directory before the update**. Your avatars and issue attachments files may be lost in the process.
+
+Plus, in some cases, gogs will not restart properly during the update, if so, you can rerun the update safely or try to start gogs with `sudo systemctl restart gogs.service`.
+
+Sources and issues of the old package can be found [here](https://github.com/YunoHost-Apps/gogs_ynh_old/)
+
 Infos
 -----
-Gogs v0.9.71
+Gogs v0.9.97
 
 Yunohost forum thread: https://forum.yunohost.org/t/gogs-package-an-awesome-github-alternative/1127
 
-Architecture: this package is compatible with amd64, i386 and arm, the package will try to detect it with the command arch and fail if it can't find it.
+Architecture: this package is compatible with amd64, i386 and arm, the package will try to detect it with the command arch and fail if it can't find it. If that happen please open an issue describing your hardware and the result of the command `arch`.
 
 License
 -------
@@ -44,11 +52,9 @@ Developper infos
 
 Please do your pull request to the dev branch.
 
-```
-
 Test or upgrade to dev version:
 ```
-su - admin
+sudo su - admin
 git clone -b dev https://github.com/YunoHost-Apps/gogs_ynh
 # to install
 sudo yunohost app install -l Gogs /home/admin/gogs_ynh