Update README, mention Debian 9.

	modified:   README.md

Author: RainerEmrich

README.md

@@ -1,6 +1,6 @@
 # install-cloud-server
 
-Script collection to setup a cloud server with Ubuntu 16.04 or Debian 8.
+Script collection to setup a cloud server with Ubuntu 16.04, Debian 8 or Debian 9.
 Installs and sets up all required packages for nextcloud.
 Finally installs nextcloud.
 
@@ -10,7 +10,7 @@ Optionally installs additional nextcloud apps.
 ## Requirements
 
 The scripts collection is tested for an 1&1 cloud server, Ubuntu 16.04,
-64-bit, standard installation and Debian 8, 64-bit, standard installation.
+64-bit, standard installation, Debian 8 and Debian 9, 64-bit, standard installation.
 
 1. For the scripts to work, you have to setup such a server as descripted in my blog at https://blog.emrich-ebersheim.de/2016/09/05/11-cloud-server-unter-ubuntu-16-04-1-lts-teil-1-server-erstellen/ (in german). For testing purposes a Cloud Server S incl. one public IP is sufficient.
 2. You have to point a DNS Entry for the host itself and a DNS Entry for the nexcloud instance to the public IP you've got.
@@ -201,5 +201,6 @@ The script collection is based on my two article series about 1&1 cloud serv
 
 ## Status
 
-Last tested with Ubuntu 16.04 on 4th of April 2018.
-Last tested with Debian 8 on 4th of April 2018.
+Last tested with Ubuntu 16.04 on 13th of April 2018.
+Last tested with Debian 8 on 13th of April 2018.
+Last tested with Debian 9 on 13th of April 2018.