Added blackfire.io

Fixed webdevops/TYPO3-docker-boilerplate#69

Author: mblaschke

docker/main/ubuntu/provision/roles/php/tasks/blackfire.yml

@@ -0,0 +1,17 @@
+- name: Add blackfire.io key
+  apt_key:
+    url:   https://packagecloud.io/gpg.key
+    state: present
+
+- name: Add blackfire.io repository
+  apt_repository:
+    repo:  'deb http://packages.blackfire.io/debian any main'
+    state: present
+    update_cache: yes
+
+- name: Install blackfire-php
+  apt:
+    name:  '{{ item }}'
+    state: present
+  with_items:
+    - blackfire-php

docker/main/ubuntu/provision/roles/php/tasks/main.yml

@@ -2,6 +2,10 @@
   tags:
     - bootstrap
 
+- include: blackfire.yml
+  tags:
+    - bootstrap
+
 - include: configuration.yml
   tags:
     - entrypoint