Have a nice message about running the postinstall when logging in ssh if yunohost aint installed

stage3/00-install-yunohost/00-run.sh

@@ -17,6 +17,8 @@ echo "root:yunohost" | chpasswd
 chage -d 0 root
 EOF
 
+install -m 755 files/check_yunohost_is_installed.sh "${ROOTFS_DIR}/etc/profile.d/"
+
 echo "Cleaning ..."
 on_chroot << EOF
 apt-get clean

stage3/00-install-yunohost/files/check_yunohost_is_installed.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+if [ -n "$BASH_VERSION" ] && [ "$-" != "${-#*i}" ]; then
+    if [ ! -f "/etc/yunohost/installed" ];
+    then
+        normal=$(printf '\033[0m')
+        bold=$(printf '\033[1m')
+        blue=$(printf '\033[34m')
+
+        IPS=$(hostname --all-ip-address | sed 's/ /\n     /g')
+        cat << EOF
+======================================================================
+${bold}${blue}
+ Congratulations on setting up your YunoHost server !
+${normal}${bold}
+ To finish the installation, you should run the postinstallation.
+ You can find documentation about it on :${normal}
+     https://yunohost.org/postinstall
+${normal}${bold}
+ You can run it from the command line interface with :${normal}
+     $ yunohost tools postinstall
+${normal}${bold}
+ Or from a browser by accessing one of your local IP :${normal}
+     $IPS${normal}
+======================================================================
+EOF
+    fi
+fi