added nix flake for build

.gitignore

@@ -1 +1,2 @@
 /target
+/result

answers.json

@@ -1,15 +0,0 @@
-[
-  {
-    "timestamp": "2025-12-01T17:58:25.865893826Z",
-    "answers": {
-      "about_you": "",
-      "password": "!Y%5#yH^QcZmwHR",
-      "age": "",
-      "favorite_color": "",
-      "email": "foobar@mail.com",
-      "website": "",
-      "full_name": "",
-      "contact_number": ""
-    }
-  }
-]

flake.lock

@@ -0,0 +1,96 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1764517877,
+        "narHash": "sha256-pp3uT4hHijIC8JUK5MEqeAWmParJrgBVzHLNfJDZxg4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2d293cbfa5a793b4c50d17c05ef9e385b90edf6c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1744536153,
+        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1764557621,
+        "narHash": "sha256-kX5PoY8hQZ80+amMQgOO9t8Tc1JZ70gYRnzaVD4AA+o=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "93316876c2229460a5d6f5f052766cc4cef538ce",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "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 +1,57 @@
+{
+  description = "Form Generator - Generate a small form website to collect answers, from a TOML config file. ";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, rust-overlay, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        overlays = [ rust-overlay.overlays.default ];
+        pkgs = import nixpkgs {
+          inherit system overlays;
+        };
+        rust = pkgs.rust-bin.stable.latest.default;
+        openssl = pkgs.openssl;
+      in
+      {
+        packages.default = pkgs.rustPlatform.buildRustPackage {
+          pname = "form-generator";
+          version = "0.1.0";
+
+          src = ./.;
+          cargoLock = {
+            lockFile = ./Cargo.lock;
+          };
+
+          nativeBuildInputs = [
+            rust
+            pkgs.pkg-config
+          ];
+
+          buildInputs = [
+            openssl
+          ];
+
+          OPENSSL_LIB_DIR = "${openssl.out}/lib";
+          OPENSSL_INCLUDE_DIR = "${openssl.dev}/include";
+          PKG_CONFIG_PATH = "${openssl.dev}/lib/pkgconfig";
+        };
+
+        devShells.default = pkgs.mkShell {
+          packages = [
+            rust
+            pkgs.cargo
+            pkgs.rust-analyzer
+            pkgs.pkg-config
+            openssl
+          ];
+          OPENSSL_DIR = openssl.dev;
+          PKG_CONFIG_PATH = "${openssl.dev}/lib/pkgconfig";
+        };
+      });
+}
+