Fix linting errors

tasks/main.yml

@@ -16,6 +16,7 @@
   template:
     src: templates/nginx.conf.j2
     dest: /etc/nginx/conf.d/{{ node_exporter_domain }}.conf
+    mode: 0600
   notify: Check and Reload nginx
 
 - name: Install apache2-utils
@@ -35,5 +36,6 @@
 
 - name: Set Login credentials
   become: yes
-  shell:
+  command:
     cmd: "htpasswd -b /etc/nginx/.htpasswd prometheus {{ prometheus_pass }}"
+    changed_when: False