feat: add flake.nix to allow building NixOS packages

flake.lock

@@ -0,0 +1,94 @@
+{
+  "nodes": {
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1694081375,
+        "narHash": "sha256-vzJXOUnmkMCm3xw8yfPP5m8kypQ3BhAIRe4RRCWpzy8=",
+        "owner": "nix-community",
+        "repo": "naersk",
+        "rev": "3f976d822b7b37fc6fb8e6f157c2dd05e7e94e89",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "master",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1695318763,
+        "narHash": "sha256-FHVPDRP2AfvsxAdc+AsgFJevMz5VBmnZglFUMlxBkcY=",
+        "path": "/nix/store/p7iz0r8gs6ppkhj83zjmwyd21k8b7v3y-source",
+        "rev": "e12483116b3b51a185a33a272bf351e357ba9a99",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1695318763,
+        "narHash": "sha256-FHVPDRP2AfvsxAdc+AsgFJevMz5VBmnZglFUMlxBkcY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e12483116b3b51a185a33a272bf351e357ba9a99",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2",
+        "utils": "utils"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,51 @@
+{
+  # Websurfx NixOS flake
+  inputs = {
+    naersk.url = "github:nix-community/naersk/master";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = {
+    naersk,
+    nixpkgs,
+    self,
+    utils,
+  }:
+  # We do this for all systems - namely x86_64-linux, aarch64-linux,
+  # x86_64-darwin and aarch64-darwin
+    utils.lib.eachDefaultSystem (system: let
+      pkgs = import nixpkgs {inherit system;};
+      naersk-lib = pkgs.callPackage naersk {};
+    in rec {
+      # Build via nix build .#defaultPackage.x86_64-linux
+      defaultPackage = naersk-lib.buildPackage {
+        # The build dependencies
+        buildInputs = with pkgs; [pkg-config openssl];
+        src = ./.;
+      };
+
+      # Enter devshell with all the tools via "nix develop"
+      # or "nix-shell"
+      devShell = with pkgs;
+        mkShell {
+          buildInputs = [
+            actionlint
+            cargo
+            haskellPackages.hadolint
+            nodePackages_latest.cspell
+            nodePackages_latest.eslint
+            nodePackages_latest.markdownlint-cli2
+            nodePackages_latest.stylelint
+            nodePackages_latest.stylelint
+            rustPackages.clippy
+            rustc
+            yamllint
+          ];
+          RUST_SRC_PATH = rustPlatform.rustLibSrc;
+        };
+
+      # Build via "nix build .#websurfx.x86_64-linux"
+      websurfx = defaultPackage;
+    });
+}