add a pre_upgrade.d about emails

doc/ADMIN.md

@@ -4,7 +4,7 @@ If you have to use the [command line interface (cli)](https://samr1.github.io/Fi
 
 ```
  pushd $install_dir/
-    pipenv shell
+    source $install_dir/venv/bin/activate
     ftcli [OPTIONS] COMMAND [ARGS]...
 ```
 

doc/ADMIN_fr.md

@@ -4,7 +4,7 @@ Si vous avez besoin d’utiliser la [ligne de commande](https://samr1.github.io/
 
 ```
  pushd $install_dir/
-    pipenv shell
+    source $install_dir/venv/bin/activate
     ftcli [OPTIONS] COMMAND [ARGS]...
 ```
 

doc/PRE_UPGRADE.d/0.7.25~ynh2.md

@@ -0,0 +1,13 @@
+Great news!
+Since latest Yunohost version 11.2.5, it’s now possible for FitTrackee to send mails 🥳
+
+By default, your mail credentials are automatically set with the __DOMAIN__ where your installed FitTrackee.
+You can change it in the config_panel (but be sure to save the initial data, in case you want revert your changes).
+
+NB: nohost.me/noho.st/ynh.fr domains are special domains handled by Yunohost. If you installed FitTrackee on a subdomain such as fittrackee.mydomain.nohost.me, emails will be blocked. You will have either to 
+    1. install FitTrackee on a "real" domain;
+    2. change your mail credentials in the config_panel.
+
+Don’t hesitate to raise an issue on the [forum](https://forum.yunohost.org/t/fittrackee-self-hosted-outdoor-activity-tracker/24141) or on [Github](https://github.com/YunoHost-Apps/fittrackee_ynh).
+
+Enjoy this app and thanks to @SamR1 for creating it!

manifest.toml

@@ -17,7 +17,7 @@ admindoc = "https://samr1.github.io/FitTrackee"
 code = "https://github.com/SamR1/FitTrackee"
 
 [integration]
-yunohost = ">= 11.2"
+yunohost = ">= 11.2.5"
 architectures = "all"
 multi_instance = true
 ldap = false