docs: Note how we use Terraform/Ansible as an example

ntools/one-m/ansible/one-m-node.yml

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+---
+# This playbook deploys a BigchainDB node in one machine (one-m).
+
+- name: deploy all software and configure it
+  hosts: all
+  remote_user: root
+
+  roles:
+    - common

ntools/one-m/ansible/roles/common/handlers/main.yml

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+---
+# This file should be in roles - common - handlers
+# Handler to handle common notifications. Handlers are called by other plays.
+# See http://docs.ansible.com/playbooks_intro.html for more information about handlers.
+
+- name: restart ntp
+  service: name=ntpd state=restarted
+
+- name: restart iptables
+  service: name=iptables state=restarted