adding nginx demo to docker setup role

roles/docker/tasks/main.yml

@@ -6,7 +6,7 @@
       include_role:
         name: nickjj.docker
 
-    - name: Ensure group "docker" exists
+    - name: Ensure group "docker" existcs
       group:
         name: docker
         state: present
@@ -32,3 +32,19 @@
         owner: root
         group: root
         mode: u=rw,g=r,o=r
+
+- name: Run a demo Nginx container
+  tags: [docker]
+  block:
+    - name: Install Docker Python SDK
+      pip:
+        name: docker
+
+    - name: Run nginxdemos/nginx-hello
+      community.docker.docker_container:
+        name: nginx-hello
+        image: nginxdemos/nginx-hello
+        state: started
+        restart: yes
+        ports:
+          - 8080:8080