refactor: move homelab config to module

modules/homelab/prometheus.nix

@@ -0,0 +1,54 @@
+{
+  config,
+  hostname,
+  lib,
+  ...
+}:
+lib.mkIf config.fireproof.homelab.enable (let
+  mkScrapeConfig = name: {
+    job_name = name;
+    static_configs = [
+      {
+        labels = {
+          instance = hostname;
+        };
+
+        targets = [
+          "${toString config.services.prometheus.exporters.${name}.listenAddress}:${toString config.services.prometheus.exporters.${name}.port}"
+        ];
+      }
+    ];
+  };
+in {
+  age.secrets.grafana-cloud-prometheus-api-key = {
+    rekeyFile = ../../secrets/grafana-cloud-prometheus.age;
+    owner = "prometheus";
+    group = "prometheus";
+  };
+
+  services.prometheus = {
+    enable = true;
+    enableAgentMode = true;
+    globalConfig.scrape_interval = "1m";
+    remoteWrite = [
+      {
+        url = "https://prometheus-prod-01-eu-west-0.grafana.net/api/prom/push";
+        basic_auth = {
+          username = "432120";
+          password_file = "${config.age.secrets.grafana-cloud-prometheus-api-key.path}";
+        };
+      }
+    ];
+
+    scrapeConfigs = [
+      (mkScrapeConfig "node")
+    ];
+
+    exporters.node = {
+      enable = true;
+      extraFlags = [
+        "--web.disable-exporter-metrics"
+      ];
+    };
+  };
+})