updated minimum required ansible version to 2.5 in README, as the used 'loop' keyword was introduced in version 2.5

[szEvEz]

Executing the role using the example playbook

- hosts: localhost
  roles:
    - dev-sec.nginx-hardening

with Ansible version > 2.5 (in my case 2.4.2) results to the following error:

[root@localhost ~]# ansible-playbook hardening.yaml
 [WARNING]: Could not match supplied host pattern, ignoring: all

 [WARNING]: provided hosts list is empty, only localhost is available

ERROR! The field 'loop' is supposed to be a string type, however the incoming data structure is a <class 'ansible.parsing.yaml.objects.AnsibleSequence'>

The error appears to have been in '/etc/ansible/roles/dev-sec.nginx-hardening/tasks/main.yml': line 66, column 3, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:


- name: remove default.conf
  ^ here

After some research I stumbled upon the following solution - it looks like the loop keyword is new in version 2.5, therefor not working with lower versions.

Upgrading my Ansible version to >=2.5 solved this issue for me.