build(nix): add Nix support

flake.nix

@@ -0,0 +1,36 @@
+{
+  description = "Tilde Friends is a platform for making, running, and sharing web applications";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+      in rec
+      {
+        # Nix formatter, run using `$ nix fmt`
+        formatter = pkgs.alejandra;
+
+        # Exports the tildefriends package
+        packages.default = pkgs.callPackage ./default.nix {};
+
+        # Creates a shell with the necessary dependencies
+        # Enter using `$ nix develop`
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            openssl
+            llvmPackages_17.clang-unwrapped
+            unzip
+          ];
+        };
+      });
+}