added flake.nix

flake.lock

@@ -0,0 +1,23 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 0,
+        "narHash": "sha256-CCS+jIsmI3o0bfQMoC45/6bJ56Dp/M8D94heC29//wI=",
+        "path": "/nix/store/7jpd4vn7wihcxr446azvqfw073j7nmx3-source",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,28 @@
+{
+  description = "Declarative jellyfin with more options";
+  inputs = {};
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
+    forAllSystems = nixpkgs.lib.genAttrs [
+      "aarch64-linux"
+      "x86_64-linux"
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ];
+  in {
+    formatter = forAllSystems (
+      system: let
+        pkgs = import nixpkgs {inherit system;};
+      in
+        pkgs.alejandra
+    );
+    nixosModules = rec {
+      declarative-jellyfin = import ./module.nix;
+      default = declarative-jellyfin;
+    };
+    nixosModule = self.nixosModules.default; # compatiblilty
+  };
+}