diff --git a/scripts/install b/scripts/install
index 6308596..cae7881 100644
--- a/scripts/install
+++ b/scripts/install
@@ -1,37 +1,64 @@
 #!/bin/bash
 
-# Exit on command errors and treat unset variables as an error
-set -eu
+#=================================================
+# GENERIC START
+#=================================================
+# IMPORT GENERIC HELPERS
+#=================================================
 
-# This is a multi-instance app, meaning it can be installed several times independently
-# The id of the app as stated in the manifest is available as $YNH_APP_ID
-# The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2", ...)
-# The app instance name is available as $YNH_APP_INSTANCE_NAME
-#    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
-#    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
-#    - ynhexample__{N} for the subsequent installations, with N=3,4, ...
-# The app instance name is probably what you are interested the most, since this is
-# guaranteed to be unique. This is a good unique identifier to define installation path,
-# db names, ...
-app=$YNH_APP_INSTANCE_NAME
+source _common.sh
+source /usr/share/yunohost/helpers
+
+#=================================================
+# MANAGE SCRIPT FAILURE
+#=================================================
+
+ynh_clean_setup () {
+	### Remove this function if there's nothing to clean before calling the remove script.
+	true
+}
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
+#=================================================
+# RETRIEVE ARGUMENTS FROM THE MANIFEST
+#=================================================
 
 # Retrieve arguments
 domain=$YNH_APP_ARG_DOMAIN
-is_public=$YNH_APP_ARG_IS_PUBLIC
 password=$YNH_APP_ARG_PASSWORD
 nextcloud_domain=$YNH_APP_ARG_NEXTCLOUDDOMAIN
 
-# Source YunoHost helpers
-source /usr/share/yunohost/helpers
-source _common.sh
+#=================================================
+# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
+#=================================================
 
+### If the app uses nginx as web server (written in HTML/PHP in most cases), the final path should be "/var/www/$app".
+### If the app provides an internal web server (or uses another application server such as uwsgi), the final path should be "/opt/yunohost/$app"
+final_path=/opt/yunohost/$app
+test ! -e "$final_path" || ynh_die "This path already contains a folder"
 
-# Save app settings
-ynh_app_setting_set "$app" is_public "$is_public"
+# Check web path availability
+ynh_webpath_available $domain
+# Register (book) web path
+ynh_webpath_register $app $domain
 
-# Check domain/path availability
-sudo yunohost app checkurl "${domain}" -a "$app" \
-    || ynh_die "Path not available: ${domain}"
+#=================================================
+# STORE SETTINGS FROM MANIFEST
+#=================================================
+
+ynh_app_setting_set $app domain $domain
+ynh_app_setting_set $app password $password
+ynh_app_setting_set $app nextcloud_domain $nextcloud_domain
+
+#=================================================
+# FIND AND OPEN A PORT
+#=================================================
+
+### Use these lines if you have to open a port for the application
+### `ynh_find_port` will find the first available port starting from the given port.
+### If you're not using these lines:
+###		- Remove the section "CLOSE A PORT" in the remove script
 
 # Find a free port
 port=$(ynh_find_port 9980)
@@ -39,9 +66,13 @@ port=$(ynh_find_port 9980)
 yunohost firewall allow --no-upnp TCP $port 2>&1
 ynh_app_setting_set $app port $port
 
+#===============================================
+# ADD COLLABORA REPOSITORY
+#===============================================
 
 apt-get -yy install apt-transport-https
 apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0C54D189F4BA284D
+
 if [ "$(lsb_release --codename --short)" != "jessie" ]; then
 echo 'deb https://collaboraoffice.com/repos/CollaboraOnline/CODE-debian8 ./' | sudo tee -a /etc/apt/sources.list.d/collabora.list
 else
@@ -49,9 +80,11 @@ else
 echo 'deb https://collaboraoffice.com/repos/CollaboraOnline/CODE-debian9 ./' | sudo tee -a /etc/apt/sources.list.d/collabora.list
 fi
 
-sudo apt-get update
-sudo apt-get install -yy loolwsd code-brand
-
+#==============================================
+# INSTALL COLLABORA
+#==============================================
+ynh_package_update
+ynh_install_app_dependencies loolwsd code-brand
 
 #=================================================
 # NGINX CONFIGURATION
@@ -67,12 +100,6 @@ ynh_add_nginx_config
 # Create a system user
 ynh_system_user_create $app
 
-#=================================================
-# SPECIFIC SETUP
-#=================================================
-# ...
-#=================================================
-
 #=================================================
 # MODIFY A CONFIG FILE
 #=================================================
@@ -81,21 +108,41 @@ ynh_replace_string "__NEXTCLOUDDOMAIN__" "$nextcloud_domain" "/etc/loolwsd/loolw
 ynh_replace_string "__PASSWORD__" "$password" "/etc/loolwsd/loolwsd.xml"
 systemctl start loolwsd
 
+
 #=================================================
-# SETUP SYSTEMD
+# STORE THE CONFIG FILE CHECKSUM
 #=================================================
 
-# Create a dedicated systemd config
-#ynh_add_systemd_config
+### `ynh_store_file_checksum` is used to store the checksum of a file.
+### That way, during the upgrade script, by using `ynh_backup_if_checksum_is_different`,
+### you can make a backup of this file before modifying it again if the admin had modified it.
+
+# Calculate and store the config file checksum into the app settings
+ynh_store_file_checksum "/etc/loolwsd/loolwsd.xml"
 
 
-# If app is public, add url to SSOWat conf as skipped_uris
-if [[ $is_public -eq 1 ]]; then
-  # unprotected_uris allows SSO credentials to be passed anyway.
-  ynh_app_setting_set "$app" unprotected_uris "/"
-fi
+#=================================================
+# GENERIC FINALIZATION
+#=================================================
+# SECURE FILES AND DIRECTORIES
+#=================================================
+
+### For security reason, any app should set the permissions to root: before anything else.
+### Then, if write authorization is needed, any access should be given only to directories
+### that really need such authorization.
+
+# Set permissions to app files
+chown -R root: /etc/loolwsd
+
+
+#=================================================
+# SETUP SSOWAT
+#=================================================
+
+# unprotected_uris allows SSO credentials to be passed anyway.
+ynh_app_setting_set $app unprotected_uris "/"
 
 # Reload services
 systemctl restart loolwsd
-systemctl restart nginx
+systemctl reload nginx