prometheus: add matrix.pub.solar scrape endpoints

For docs, see:
https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/master/docs/configuring-playbook-prometheus-grafana.md

monitoring/prometheus/src/etc/prometheus/prometheus.yml

@@ -38,3 +38,27 @@ scrape_configs:
 
     static_configs:
       - targets: ["cloud.pub.solar:443"]
+
+  - job_name: "matrix_pub_solar_node_exporter"
+    # metrics_path defaults to '/metrics'
+    metrics_path: /metrics/node-exporter
+    # scheme defaults to 'http'.
+    scheme: https
+    basic_auth:
+      username: crew@pub.solar
+      password: '$2b$12$UPWIvXPAGVDC3KEMuHpEMujwLfPUL0RQS7svuo2RZAScsjVwsE.k6'
+
+    static_configs:
+      - targets: ["matrix.pub.solar:443"]
+
+  - job_name: "matrix_pub_solar_synapse"
+    # metrics_path defaults to '/metrics'
+    metrics_path: /metrics/synapse/main-process
+    # scheme defaults to 'http'.
+    scheme: https
+    basic_auth:
+      username: crew@pub.solar
+      password: '$2b$12$UPWIvXPAGVDC3KEMuHpEMujwLfPUL0RQS7svuo2RZAScsjVwsE.k6'
+
+    static_configs:
+      - targets: ["matrix.pub.solar:443"]