also refactor nixos modules

modules/nixos/services/media/jellyfin.nix

@@ -0,0 +1,47 @@
+{
+  pkgs,
+  config,
+  lib,
+  inputs,
+  ...
+}: let
+  inherit (builtins) toString;
+  inherit (lib) mkIf mkEnableOption mkOption types;
+
+  cfg = config.sneeuwvlok.services.media.jellyfin;
+in {
+  options.sneeuwvlok.services.media.jellyfin = {
+    enable = mkEnableOption "Enable jellyfin server";
+  };
+
+  config = mkIf cfg.enable {
+    sneeuwvlok.services.networking.caddy = {
+      hosts = {
+        "jellyfin.kruining.eu" = ''
+          reverse_proxy http://[::1]:8096
+        '';
+      };
+    };
+
+    environment.systemPackages = with pkgs; [
+      jellyfin
+      jellyfin-web
+      jellyfin-ffmpeg
+      mediainfo
+      id3v2
+      yt-dlp
+    ];
+
+    services = {
+      # port is harcoded in nixpkgs module
+      jellyfin = {
+        enable = true;
+        openFirewall = true;
+        user = "media";
+        group = "media";
+      };
+    };
+
+    systemd.services.jellyfin.serviceConfig.killSignal = lib.mkForce "SIGKILL";
+  };
+}