start refactoring shared code into modules, update the lock, do some other minor fixes

modules/nixos/shared-packages/server-settings/dashboard/prometheus/default.nix

@@ -0,0 +1,34 @@
+{config, ...}: {
+  services.prometheus = {
+    enable = true;
+    port = 9001;
+    # Export the current system metrics
+    exporters = {
+      node = {
+        enable = true;
+        enabledCollectors = ["systemd"];
+        port = 9002;
+      };
+    };
+    scrapeConfigs = [
+      # Scrape the current system
+      {
+        job_name = "GrafanaService system";
+        static_configs = [
+          {
+            targets = ["127.0.0.1:${toString config.services.prometheus.exporters.node.port}"];
+          }
+        ];
+      }
+      # Scrape the Loki service
+      {
+        job_name = "Loki service";
+        static_configs = [
+          {
+            targets = ["127.0.0.1:3100"];
+          }
+        ];
+      }
+    ];
+  };
+}