add prometheus-nginxlog-exporter role (#2315)

* add prometheus-nginxlog-exporter role

* Rename matrix_prometheus_nginxlog_exporter_container_url to matrix_prometheus_nginxlog_exporter_container_hostname

* avoid referencing variables from other roles, handover info using group_vars/matrix_servers

* fix: stop service when uninstalling

fix: typo

move available arch's into a var

fix: text

* fix: prometheus enabled condition

Co-authored-by: ikkemaniac <ikkemaniac@localhost>

roles/custom/matrix-prometheus/templates/prometheus.yml.j2

@@ -64,3 +64,10 @@ scrape_configs:
     static_configs:
       - targets: {{ matrix_prometheus_scraper_hookshot_targets|to_json }}
   {% endif %}
+
+  {% if matrix_prometheus_scraper_nginxlog_enabled %}
+  - job_name: nginxlog
+    static_configs:
+      - targets:
+        - {{ matrix_prometheus_scraper_nginxlog_server_port}}
+  {% endif %}