Adding quick dev setup using nix and direnv

.envrc

@@ -0,0 +1 @@
+use nix

.gitignore

@@ -28,3 +28,4 @@
 node_modules
 .editorconfig
 .env
+/.direnv/

README.md

@@ -44,6 +44,8 @@ To run Keyoxide locally on your machine for development:
     - directly from their [website](https://nodejs.org/en/), or
     - using [nvm](https://github.com/nvm-sh/nvm): `nvm install --lts; nvm use --lts`
   - [yarn](https://yarnpkg.com/)
+  - [nix](https://nixos.org/guides/install-nix.html) with
+    [direnv](https://direnv.net/) will install yarn and other dependencies.
 - install dependencies with `npm install` or `yarn`
 - run the server with `npm dev` or `yarn dev`
 

shell.nix

@@ -0,0 +1,16 @@
+
+{ pkgs ? import <nixpkgs> {}}:
+let
+  unstable = import (fetchTarball "https://channels.nixos.org/nixpkgs-unstable/nixexprs.tar.xz") {};
+in
+pkgs.mkShell {
+  nativeBuildInputs = with pkgs; [
+  	nodejs
+		yarn
+    xvfb_run
+    unstable.cypress
+  ];
+
+  CYPRESS_INSTALL_BINARY=0; #skip installing the Cypress binary from yarn
+  CYPRESS_RUN_BINARY="${unstable.cypress}/bin/Cypress";
+}