viola: upstream

Signed-off-by: s0me1newithhand7s <git+me@hand7s.org>

viola/services/alertmanager.nix

@@ -0,0 +1,27 @@
+_: {
+  services = {
+    prometheus = {
+      alertmanager = {
+        enable = true;
+        configuration = {
+          route = {
+            receiver = "null";
+            group_by = [
+              "alertname"
+              "job"
+            ];
+
+            group_wait = "30s";
+            group_interval = "5m";
+            repeat_interval = "12h";
+          };
+          receivers = [
+            {
+              name = "null";
+            }
+          ];
+        };
+      };
+    };
+  };
+}