diff --git a/scripts/_common.sh b/scripts/_common.sh
index 7e55ac0..97fcd3f 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -18,3 +18,56 @@ pkg_dependencies="deb1 deb2 php$YNH_DEFAULT_PHP_VERSION-deb1 php$YNH_DEFAULT_PHP
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================
+
+# Send an email to inform the administrator
+#
+# usage: ynh_send_readme_to_admin app_message [recipients]
+# | arg: app_message - The message to send to the administrator.
+# | arg: recipients - The recipients of this email. Use spaces to separate multiples recipients. - default: root
+#	example: "root admin@domain"
+#	If you give the name of a YunoHost user, ynh_send_readme_to_admin will find its email adress for you
+#	example: "root admin@domain user1 user2"
+ynh_send_readme_to_admin() {
+	local app_message="${1:-...No specific information...}"
+	local recipients="${2:-root}"
+
+	# Retrieve the email of users
+	find_mails () {
+		local list_mails="$1"
+		local mail
+		local recipients=" "
+		# Read each mail in argument
+		for mail in $list_mails
+		do
+			# Keep root or a real email address as it is
+			if [ "$mail" = "root" ] || echo "$mail" | grep --quiet "@"
+			then
+				recipients="$recipients $mail"
+			else
+				# But replace an user name without a domain after by its email
+				if mail=$(ynh_user_get_info "$mail" "mail" 2> /dev/null)
+				then
+					recipients="$recipients $mail"
+				fi
+			fi
+		done
+		echo "$recipients"
+	}
+	recipients=$(find_mails "$recipients")
+
+	local mail_subject="☁️🆈🅽🅷☁️: \`$app\` has important message for you"
+
+	local mail_message="This is an automated message from your beloved YunoHost server. Specific information for $app.
+$app_message"
+
+	# Define binary to use for mail command
+	if [ -e /usr/bin/bsd-mailx ]
+	then
+		local mail_bin=/usr/bin/bsd-mailx
+	else
+		local mail_bin=/usr/bin/mail.mailutils
+	fi
+
+	# Send the email to the recipients
+	echo "$mail_message" | $mail_bin -a "Content-Type: text/plain; charset=UTF-8" -s "$mail_subject" "$recipients"
+}
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index 58ab20e..7701d48 100755
--- a/scripts/install
+++ b/scripts/install
@@ -95,9 +95,9 @@ ynh_script_progression --message="Setting up source files..." --weight=1
 ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 
 mkdir "$final_path"
-cp -f ../conf/default.yml "$final_path/docker-compose.yml"
-cp -f ../conf/default.yml "$final_path/lemmy.hjson"
-cp -f ../conf/default.yml "$final_path/iframely.config.local.js"
+cp -f ../conf/docker-compose.yml "$final_path/docker-compose.yml"
+cp -f ../conf/lemmy.hjson "$final_path/lemmy.hjson"
+cp -f ../conf/iframely.config.local.js "$final_path/iframely.config.local.js"
 pushd "$final_path"
 	mkdir -p volumes/pictrs
 	chown -R 991:991 volumes/pictrs
@@ -151,6 +151,23 @@ ynh_systemd_action --service_name=nginx --action=reload
 cd "$final_path" && docker-compose up -d
 
 
+#=================================================
+# SEND A README FOR THE ADMIN
+#=================================================
+
+message="Lemmy was successfully installed :)
+
+Please open https://$domain$path_url
+
+Your credentials for the admin panel are:
+- admin username: $admin
+- admin password: $password
+
+If you facing an issue or want to improve Lemmy, please open a new issue in this project: https://github.com/YunoHost-Apps/lemmy_ynh/issues"
+
+ynh_send_readme_to_admin "$message"
+
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 435a637..9d8aa56 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -58,9 +58,9 @@ then
 	ynh_script_progression --message="Upgrading source files..."  --weight=1
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	cp -f ../conf/default.yml "$final_path/docker-compose.yml"
-	cp -f ../conf/default.yml "$final_path/lemmy.hjson"
-	cp -f ../conf/default.yml "$final_path/iframely.config.local.js"
+	cp -f ../conf/docker-compose.yml       "$final_path/docker-compose.yml"
+	cp -f ../conf/lemmy.hjson              "$final_path/lemmy.hjson"
+	cp -f ../conf/iframely.config.local.js "$final_path/iframely.config.local.js"
 	pushd "$final_path"
 		chown -R 991:991 volumes/pictrs
 	popd