making it functional when you have a minimal host

ansible/playbook.yml

@@ -3,16 +3,17 @@
 
   vars:
     pip_install_packages:
+      - name: wheel
+      - name: pip
+        state: latest
+      - name: setuptools
+      - name: cffi
       - name: docker
+      - name: dockerpty
     docker_compose_version: "v2.0.1"
 
-  tasks:
-    - name: Ensure {{inventory_hostname}} is set as hostname
-      hostname:
-        name: "{{inventory_hostname}}"
-      tags: ["hostname"]
-
   roles:
+    - {role: requirements,            tags: ["docker", "requirements"]}
     - {role: geerlingguy.docker,      tags: ["docker"]}
     - {role: geerlingguy.pip,         tags: ["docker"]}
     - {role: nginx,                   tags: ["nginx"]}

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