alpine: add ntfy

nixos/services/ntfy.nix

@@ -0,0 +1,19 @@
+{ config, ... }:
+let
+  domain = "up.${config.networking.domain}";
+  port = 8080;
+in
+{
+  services.ntfy-sh = {
+    enable = true;
+    settings = {
+      base-url = "https://${domain}";
+      listen-http = ":${toString port}";
+    };
+  };
+  services.nginx.virtualHosts.${domain} = {
+    forceSSL = true;
+    enableACME = true;
+    locations."~".proxyPass = "http://localhost:${toString port}";
+  };
+}