add hookshot metrics to internal prometheus

roles/matrix-bridge-hookshot/defaults/main.yml

@@ -20,7 +20,9 @@ matrix_hookshot_appservice_endpoint: "{{ matrix_hookshot_public_endpoint }}/_mat
 
 # metrics work only in conjunction with matrix_synapse_metrics_enabled etc
 matrix_hookshot_metrics_enabled: true
-# there is no need to edit ports. use matrix_hookshot_container_http_host_bind_ports below to expose ports instead.
+# there is no need to edit ports.
+# read the documentation to learn about using hookshot metrics with external Prometheus
+# if you still want something different, use matrix_hookshot_container_http_host_bind_ports below to expose ports instead.
 matrix_hookshot_metrics_port: 9001
 matrix_hookshot_metrics_endpoint: "{{ matrix_hookshot_public_endpoint }}/metrics"
 

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

@@ -57,3 +57,9 @@ scrape_configs:
     static_configs:
       - targets: {{ matrix_prometheus_scraper_postgres_targets|to_json }}
   {% endif %}
+
+  {% if matrix_prometheus_scraper_hookshot_enabled %}
+  - job_name: hookshot
+    static_configs:
+      - targets: {{ matrix_prometheus_scraper_hookshot_targets|to_json }}
+  {% endif %}