updating service alert with higher wait time (5m) (#25)

monitoring/templates/alert.rules

@@ -2,15 +2,15 @@ groups:
 - name: basic
   rules:
 
-  # Alert for any instance that is unreachable for >2 minutes.
+  # Alert for any instance that is unreachable for >5 minutes.
   - alert: service_down
-    expr: 100  * (count(up == 0) BY (job) / count(up) BY (job)) > 10
-    for: 2m
+    expr: 100  * (count(up == 0) BY (job) / count(up) BY (job)) > 5
+    for: 5m
     labels:
       severity: critical
     annotations:
       summary: "Instance {{ $labels.instance }} down"
-      description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 2 minutes."
+      description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 5 minutes."
 
   - alert: high_load
     expr: node_load1 > 2
@@ -66,4 +66,3 @@ groups:
   ${elasticsearch_rules}
   ${elasticsearch_additional_rules}
   ${custom_alert_rules}
-