[DOC] update readme (fix #1), refactor

tasks/main.yml

@@ -1,2 +1,10 @@
 ---
-# tasks file for server
+# Common Server Setup Tasks
+# This default task will leave out mosts of the availabe tasks intentionnally.
+# Activate them on a case-by-case basis.
+
+- name: Basic setup
+  import_tasks: setup.yml
+
+- name: Setup cronjob mails
+  import_tasks: cronmails.yml

tasks/telegraf.yml

@@ -1,7 +1,7 @@
 ---
 # Server/Telegraf: Install and Setup Telegraf Monitoring
 # Variables:
-# - telegraf_snmp: boolean, enable SNMP monitoring
+# - telegraf_snmp_fra80: boolean, enable SNMP monitoring for the fra80 network
 # - telegraf_docker: boolean, enable docker monitoring
 
 - name: telegraf - Install apt-transport-https