disable indexing of pagure-staging - converted robots.txt to template

roles/pagure/frontend/files/robots.txt

@@ -1,5 +0,0 @@
-User-agent: *
-Disallow: /api
-Disallow: /login
-Disallow: /*/raw
-Crawl-Delay: 2 

roles/pagure/frontend/tasks/main.yml

@@ -31,7 +31,7 @@
   - pagure
 
 - name: Put in robots.txt
-  copy: src=robots.txt dest=/var/www/html/robots.txt
+  template: src=robots.txt.j2 dest=/var/www/html/robots.txt
   tags:
   - pagure
 

roles/pagure/frontend/templates/robots.txt.j2

@@ -0,0 +1,9 @@
+User-agent: *
+{% if env == 'pagure-staging' %}
+Disallow: /
+{% else %}
+Disallow: /api
+Disallow: /login
+Disallow: /*/raw
+Crawl-Delay: 2
+{% endif %}