Updated readme with instructions

README.md

 # scaling_scheduler
 
-Use this command when cloning thisrepo for submodules to clone as well  
-git clone --recurse-submodules  
+Use this command when cloning this repo for submodules to clone as well  
+git clone --recurse-submodules repo_url  
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+
+* Edit scale_env.yaml with all necessary values from openstack
+* Run setup.sh on a manager instance that is authenticated in the openstack cli (e.g run service user script)
+
+Example environment variables
+```
+parameters:
+  key: 'manager'
+  image: 'Ubuntu Server 18.04 LTS (Bionic Beaver) amd64'
+  flavor: 'm1.small'
+  database_flavor: 'm1.small'
+  external_network_id: 'internal'
+  network: 'net1'
+  subnet_id: 'subnet1'
+  database_name: 'wordpress_db'
+  database_user: 'wordpress_admin'
+```
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