[copr] put banner at dev instance of copr-front

roles/copr/frontend/files/banner-include.html

@@ -0,0 +1,8 @@
+<div class="page">
+<h1>
+  Warning! This is a development server.
+</h1>
+<h2>
+  Production instance: <a href="https://copr.fedoraproject.org/">https://copr.fedoraproject.org/ </a>
+</h2>
+</div>

roles/copr/frontend/tasks/main.yml

@@ -87,3 +87,7 @@
 
 - name: set acl for logstash to access httpd logs
   acl: name=/var/log/httpd entity=logstash etype=user permissions=rx state=present
+
+- name: set dev banner for dev instance
+  when: devel
+  copy: src=banner-include.html dst=/var/lib/copr/