Optimized nginx CSP (prop. leads to problems due to too high restrictions for some roles) and implemented health check for mailer

roles/health-msmtp/meta/main.yml

@@ -0,0 +1,25 @@
+galaxy_info:
+  author: "Kevin Veen-Birkenbach"
+  description: "Sends periodic health check emails via msmtp"
+  license: "CyMaIS NonCommercial License (CNCL)"
+  license_url: "https://s.veen.world/cncl"
+  company: |
+    Kevin Veen-Birkenbach
+    Consulting & Coaching Solutions
+    https://www.veen.world
+  min_ansible_version: "2.9"
+  platforms:
+    - name: Archlinux
+      versions:
+        - rolling
+  galaxy_tags:
+    - health
+    - msmtp
+    - email
+    - systemd
+    - monitoring
+  repository: "https://s.veen.world/cymais"
+  issue_tracker_url: "https://s.veen.world/cymaisissues"
+  documentation: "https://s.veen.world/cymais"
+dependencies:
+  - systemd-notifier-telegram