diff --git a/README.md b/README.md
index 2b43238..4d245de 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,16 @@ If you don't have YunoHost, please see [here](https://yunohost.org/#/install) to
 ![](https://www.collaboraoffice.com/wp-content/uploads/2019/07/Collabora_Online_-_versions_integration.png)
 
 ## Configuration
+**Settings:**
+The settings of Collabora are at `https://office.domain.tld/loleaflet/dist/admin/admin.html`.
+
+- User: admin
+- Password: The password set during the installation. (If you forgot it, you can find it again in `/etc/loolwsd/loolwsd.xml`).
+
+## Connexion to Nextcloud
+If you want to connect with Nextcloud, you have to install the [Collabora Online](https://apps.nextcloud.com/apps/richdocuments) app in Nextcloud, and configure it with the domain of your Collabora installation.
+
+*:warning: There are several Collabora Online apps. Be sure **not** to install the `Collabora Online - Built-in CODE server` apps, which are a lightwheigt version of this Collabora package. :warning:*
 
 ## Documentation
 
@@ -32,16 +42,16 @@ If you don't have YunoHost, please see [here](https://yunohost.org/#/install) to
 
 ## Limitations
 
-ARM platform not supported.
-CODE has a warning limitation
+**ARM platform not supported.** If you want to run Collabora on Nextcloud, there is a lightweight version of the Collabora server for ARM, called [Collabora Online - Built-in CODE Server (ARM64)](https://apps.nextcloud.com/apps/richdocumentscode_arm64) which can easily connect with the [Collabora Online](https://apps.nextcloud.com/apps/richdocuments) app.
+
+**CODE has a warning limitation**
 
 ![](https://www.libreoffice.org/assets/Uploads/LibreOffice-Online-limit.png)
 
 ## Additionnal informations
 
 **Upgrade this package:** 
-You can use your YunoHost admin interface, or the command line: `sudo yunohost app upgrade --debug collabora -u https://github.com/YunoHost-Apps/collabora_ynh`
-
+You can use your YunoHost admin interface, or the command line: `sudo yunohost app upgrade collabora -u https://github.com/YunoHost-Apps/collabora_ynh --debug`
 
 ## Links
 
diff --git a/scripts/install b/scripts/install
index 8f75917..339e753 100644
--- a/scripts/install
+++ b/scripts/install
@@ -35,6 +35,11 @@ app=$YNH_APP_INSTANCE_NAME
 #=================================================
 ynh_script_progression --message="Validating installation parameters..."
 
+if dpkg-architecture --is armhf
+then
+    ynh_die --message="Sorry, this app can not be installed on an ARM architecture"
+fi
+
 # Register (book) web path
 ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url