add fqdn to hosts file

fixes #4

config/etc/hosts

@@ -0,0 +1,4 @@
+127.0.0.1   localhost %fqdn%
+::1         localhost ip6-localhost ip6-loopback %fqdn%
+ff02::1     ip6-allnodes
+ff02::2     ip6-allrouters

post-debootstrap-installer.sh

@@ -127,6 +127,8 @@ apt-get -y --purge autoremove
 
 apt-get -y install unbound
 
+# add fqdn to hosts file to mitigate nameserver failure
+sed -i "s/%fqdn%/$(hostname)/g" /etc/hosts
 
 # as last step set dns to local,
 # as unbound isn't running in the live/rescue system chroot,