making it functional when you have a minimal host

ansible/roles/requirements/tasks/main.yml

@@ -0,0 +1,11 @@
+---
+- name: Ensure {{inventory_hostname}} is set as hostname
+  hostname:
+    name: "{{inventory_hostname}}"
+  tags: ["hostname"]
+
+- include_tasks: setup-RedHat.yml
+  when: ansible_os_family == 'RedHat'
+
+- include_tasks: setup-Debian.yml
+  when: ansible_os_family == 'Debian'

ansible/roles/requirements/tasks/setup-Debian.yml

@@ -0,0 +1,9 @@
+- name: Ensure packages for some requirements are installed
+  apt:
+    pkg:
+      - libffi-dev
+      - libzbar-dev
+      - libzbar0
+      - python3-docopt
+    update_cache: yes
+    state: present

ansible/roles/requirements/tasks/setup-RedHat.yml

@@ -0,0 +1,9 @@
+- name: Ensure packages for some requirements are installed
+  dnf:
+    name:
+      - libffi-devel
+      - zbar-devel
+      - zbar
+      - python3-docopt
+    update_cache: yes
+    state: present