copr: use robots.txt for dist-git

roles/copr/dist_git/files/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /

roles/copr/dist_git/tasks/main.yml

@@ -108,6 +108,11 @@
 - name: allow httpd to run cgit
   command: setsebool -P httpd_enable_cgi 1
 
+- name: install robots.txt
+  copy: src="robots.txt" dest="/var/www/html/" mode=0644
+  tags:
+  - config
+
 - name: ensure that services are enabled and started
   service: name="{{ item }}" enabled=yes state=started
   with_items: