refactor: categorised apps

modules/nixos/selfhosted/monitoring/promtail.nix

@@ -0,0 +1,55 @@
+{lib, ...}: {
+  services = {
+    promtail = {
+      enable = true;
+      configuration = {
+        server = {
+          http_listen_port = 9080;
+          grpc_listen_port = 0;
+        };
+        positions = {
+          filename = "/var/lib/promtail/positions.yaml";
+        };
+        clients = [
+          {
+            url = "https://loki.tux.rs/loki/api/v1/push";
+          }
+        ];
+        scrape_configs = [
+          {
+            job_name = "journal";
+            journal = {
+              max_age = "12h";
+              labels = {
+                job = "systemd-journal";
+              };
+            };
+            relabel_configs = [
+              {
+                source_labels = [
+                  "__journal__systemd_unit"
+                ];
+                target_label = "unit";
+              }
+            ];
+          }
+        ];
+      };
+    };
+
+    nginx = {
+      enable = lib.mkForce true;
+      virtualHosts = {
+        "promtail.tux.rs" = {
+          forceSSL = true;
+          useACMEHost = "tux.rs";
+          locations = {
+            "/" = {
+              proxyPass = "http://localhost:9080";
+            };
+          };
+        };
+      };
+    };
+  };
+}