Update bootstrap script

bootstrap/create_ansible_user.sh

@@ -1,13 +1,19 @@
 #!/bin/env bash
 
-PUBKEY=./id_ansible.pub
+if [ -z $1 ];
+ then
+    echo 'Please, provide the path to the Ansible public key as an argument'
+    exit 1
+fi
+
+PUBKEY=$1
 
 useradd ansible --create-home --shell /bin/bash
 # Ensure existing but unusable password (for Ubuntu)
 usermod -p '*' ansible
 mkdir /home/ansible/.ssh
-chown -R ansible:ansible /home/ansible/.ssh
 install -m 600 $PUBKEY /home/ansible/.ssh/authorized_keys
+chown -R ansible:ansible /home/ansible/.ssh
 chmod 700 /home/ansible/.ssh
 # Allow passwordless sudo
 echo "ansible ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers.d/ansible