Add new virtual machine host 'unicorn'

Required for running unify controller, which is itself required for
configuring our WiFi access points.

Precedes: #16

README.md

@@ -3,6 +3,7 @@
 Currently including the following hosts:
 * tau.netz39.de
 * pottwal.n39.eu
+* unicorn.n39.eu
 
 ## Setup
 ```bash

inventory

@@ -77,3 +77,5 @@ all:
         3665386538393066380a383366346235343531306561643534663035646537666534383536333230
         34613761363237633865306332653631323366343232353666343165666664343838
 
+    unicorn.n39.eu:
+      server_admin: "admin+unicorn@netz39.de"

main.yml

@@ -39,3 +39,6 @@
 
 - name: Pottwal specific setup
   import_playbook: pottwal.yml
+
+- name: Specific setup for host unicorn
+  import_playbook: unicorn.yml

unicorn.yml

@@ -0,0 +1,11 @@
+---
+- hosts: unicorn.n39.eu
+  become: true
+
+  vars:
+    ansible_python_interpreter: /usr/bin/python3
+
+  roles:
+    - role: docker_setup
+      vars:
+        docker_data_root: "/srv/docker"