- unistall script for certbot

- update resource limits for some docker container

roles/certbot/tasks/uninstall.yml

@@ -1,6 +1,11 @@
 ---
 # uninstall certbot
 
+- name: stop nginx before removing it
+  service:
+    name: nginx
+    state: stopped
+
 - name: uninstall certbot on ubuntu 16.04
   apt:
     state: absent