add nix flake

flake.lock

@@ -0,0 +1,82 @@
+{
+  "nodes": {
+    "crane": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1719249093,
+        "narHash": "sha256-0q1haa3sw6GbmJ+WhogMnducZGjEaCa/iR6hF2vq80I=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "9791c77eb7e98b8d8ac5b0305d47282f994411ca",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1719254875,
+        "narHash": "sha256-ECni+IkwXjusHsm9Sexdtq8weAq/yUyt1TWIemXt3Ko=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2893f56de08021cffd9b6b6dfc70fd9ccd51eb60",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "crane": "crane",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,44 @@
+{
+  description = "Nostr Relay written in Rust";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+
+    flake-utils.url = "github:numtide/flake-utils";
+
+    crane = {
+      url = "github:ipetkov/crane";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = inputs@{ self, ... }:
+    inputs.flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = inputs.nixpkgs.legacyPackages.${system};
+        craneLib = inputs.crane.mkLib pkgs;
+        src = pkgs.lib.cleanSourceWith {
+          src = ./.;
+          filter = path: type:
+            (pkgs.lib.hasSuffix "\.proto" path) ||
+            # Default filter from crane (allow .rs files)
+            (craneLib.filterCargoSources path type)
+          ;
+        };
+        crate = craneLib.buildPackage {
+          name = "nostr-rs-relay";
+          inherit src;
+          nativeBuildInputs = [ pkgs.pkg-config pkgs.protobuf ];
+        };
+      in
+      {
+        checks = {
+          inherit crate;
+        };
+        packages.default = crate;
+        formatter = pkgs.nixpkgs-fmt;
+        devShells.default = craneLib.devShell {
+          checks = self.checks.${system};
+        };
+      });
+}