Update README

README.md

 On server
 ==============
 
-edit /root/machine.conf and update variables
-
+* edit `/root/machine.conf` and update variables
+* configure only the internal IP addresses (applied to `eth0`).
+* create VM:
 ```shell
-# kick installation
 virt-install-debian
-
-export DOMAIN=srvXXX
-
-# login and create /root/.ssh
-# install curl (until its part of base install)
-
-# shutdown
-virsh shutdown $DOMAIN
-
-# copy ssh-keys of admins into machine
-virt-copy-in -d $DOMAIN authorized_keys /root/.ssh/
-
-# start again
-virsh start $DOMAIN
-
-# set domain to autostart
-virsh autostart $DOMAIN
 ```
+* add additional network interfaces, when needed
 
 Chef Bootstrapping (On Your Workstation)
 ========================================
 
+* When bootstrapping a publicly reachable VM
+```shell
     knife bootstrap --bootstrap-version 12.5.1 -N srvXXX.typo3.org -E production -r "recipe[t3-base]" -E production --ssh-user=root 46.4.xxx.yyy
-    # cleanup root/.ssh/authorized_keys
+```
+
+* When bootstrapping a VM in the private network:
+```shell
+    knife bootstrap --bootstrap-version 12.5.1 -N srv171-test.typo3.org -E production -r "recipe[t3-base]" --ssh-gateway username@msXX.typo3.org  10.186.2.xx
+```