Merge branch '388-alpha-test-installation-of-nextcloud-fails-master' into 'master'

Update documentation to refer to new alpha release

Closes #388

See merge request openappstack/openappstack!142

docs/installation_instructions.md

@@ -42,11 +42,15 @@ guide][https://openappstack.net/contact.html).
 ## Install OpenAppStack command line tool
 
 On your **provisioning machine**, clone the OpenAppStack git repository and
-checkout the latest tagged version (currently `0.2.1`):
+checkout the latest tagged version (currently `0.2.2`):
 
-    $ git clone -b 0.2.1 https://open.greenhost.net/openappstack/openappstack.git
+    $ git clone -b 0.2.2 https://open.greenhost.net/openappstack/openappstack.git
     $ cd openappstack
 
+> **NOTE:** Git will display a warning after you use the `git` command
+> saying that you are in a *detached HEAD* state. This is perfectly normal
+> and you can proceed without any further actions.
+
 
 If you installed `virtualenv`, create a python virtual environment called "env"
 that uses python 3. This makes sure we do not change any of your other python