add homework 8.1, task 1 and partial task 2

src/homework/08-ansible/8.1/playbook/docker_run.sh

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+docker run --rm -d --name=centos7 centos:7  tail -f /dev/null \
+  && docker run --rm -d --name=debian debian:stable-slim tail -f /dev/null

src/homework/08-ansible/8.1/playbook/group_vars/all/example.yml

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+---
+some_fact: "all default fact"

src/homework/08-ansible/8.1/playbook/group_vars/deb/example.yml

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+---
+some_fact: "deb default fact"

src/homework/08-ansible/8.1/playbook/group_vars/el/example.yml

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+---
+some_fact: "el default fact"

src/homework/08-ansible/8.1/playbook/inventory/prod.yml

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+---
+el:
+  hosts:
+    centos7:
+      ansible_connection: docker
+deb:
+  hosts:
+    debian:
+      ansible_connection: docker

src/homework/08-ansible/8.1/playbook/inventory/test.yml

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+---
+inside:
+  hosts:
+    localhost:
+      ansible_connection: local

src/homework/08-ansible/8.1/playbook/site.yml

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+---
+- name: Print os facts
+  hosts: all
+  tasks:
+    - name: Print OS
+      debug:
+        msg: "{{ ansible_distribution }}"
+    - name: Print fact
+      debug:
+        msg: "{{ some_fact }}"