alpine: many changes

- updates
- snapserver
- graphana dashboards
- loki
- ddclient
- arr suite, jellyseer
- mautrix fixes

nixos/services/synapse/metrics.nix

@@ -0,0 +1,25 @@
+let
+  port = 9008;
+in {
+  services.prometheus.scrapeConfigs = [{
+    job_name = "synapse";
+    metrics_path = "/_synapse/metrics";
+    static_configs = [{
+      targets = ["localhost:${toString port}"];
+    }];
+  }];
+  services.matrix-synapse.settings = {
+    enable_metrics = true;
+    listeners = [
+      {
+        port = port;
+        type = "metrics";
+        bind_addresses = ["127.0.0.1"];
+        tls = false;
+        resources = []; # unneeded with type: metrics, just to make the nix module happy
+      }
+    ];
+  };
+# Grafana rules? 
+# https://github.com/element-hq/synapse/tree/master/contrib/prometheus/
+}