feat: close preprod observability loop

deploy/observability/prometheus/prometheus.yml

@@ -2,6 +2,12 @@ global:
   scrape_interval: 15s
   evaluation_interval: 15s
 
+alerting:
+  alertmanagers:
+    - static_configs:
+        - targets:
+            - alertmanager:9093
+
 rule_files:
   - /etc/prometheus/rules/*.yml
 
@@ -15,3 +21,22 @@ scrape_configs:
     static_configs:
       - targets:
           - alloy:12345
+
+  - job_name: preprod-uptime
+    metrics_path: /probe
+    params:
+      module:
+        - http_2xx
+    static_configs:
+      - targets:
+          - http://web/
+          - http://api:8080/health/ready
+    relabel_configs:
+      - source_labels:
+          - __address__
+        target_label: __param_target
+      - source_labels:
+          - __param_target
+        target_label: instance
+      - target_label: __address__
+        replacement: blackbox:9115