Update for v12

Getting-started.md

@@ -3,7 +3,7 @@
 CyberChef uses the Grunt build system, so it's very easy to install. You'll need to carry out the following steps to get going:
 
  1. Install Git
- 2. Install Node.js version 18 and npm version 8 ([nvm](https://github.com/nvm-sh/nvm) is usually a good way of managing your Node versions)
+ 2. Install Node.js version 24 ([nvm](https://github.com/nvm-sh/nvm) is usually a good way of managing your Node versions)
  3. `git clone https://github.com/gchq/CyberChef.git`
  4. `cd CyberChef`
  5. `npm install`
@@ -65,9 +65,8 @@ npm test
          - `static/` - Static files like images
  - `test/`
      - `tests/` - Configuration for tests on operations and recipes
- - `.babelrc` - Babel transpilation configuration
+ - `babel.config.js` - Babel transpilation configuration
  - `.editorconfig` - Text editor conventions stored in a cross-compatible format
- - `.travis.yml` - Travis CI build process configuration
  - `Gruntfile.js` - Grunt build process configuration
  - `webpack.config.js` - Webpack configuration
  - `postcss.config.js` - PostCSS configuration