message: Remove reference of node.js-version specific Docker images
diff: @@ -128,15 +128,11 @@ OWASP Juice Shop officially supports the following versions of
  [node.js](http://nodejs.org) and offers Docker images and packaged
  distributions accordingly:
  -| node.js | [Docker images](https://registry.hub.docker.com/u/bkimminich/juice-shop) (from `master`) | Docker snapshots (from `develop`) | [Packaged distributions](https://github.com/bkimminich/juice-shop/releases/latest) |
  -|:--------|:-----------------------------------------------------------------------------------------|:----------------------------------|:-----------------------------------------------------------------------------------------|
  -| 4.x | `node4` | `node4-snapshot` | `juice-shop-<version>_node4_windows_x64.zip`, `juice-shop-<version>_node4_linux_x64.tgz` |
  -| __6.x__ | __`latest`__, `node6` | `snapshot`, `node6-snapshot` | `juice-shop-<version>_node6_windows_x64.zip`, `juice-shop-<version>_node6_linux_x64.tgz` |
  -| 8.x | `node8` | `node8-snapshot` | `juice-shop-<version>_node8_windows_x64.zip`, `juice-shop-<version>_node8_linux_x64.tgz` |
  -
  -> The stable Docker images are built from `master` while the snapshot
  -> images are built from `develop` branch. The latter contain unreleased
  -> features but cannot be considered stable.
  +| node.js | [Docker image](https://registry.hub.docker.com/u/bkimminich/juice-shop) | [Packaged distributions](https://github.com/bkimminich/juice-shop/releases/latest) |
  +|:--------|:------------------------------------------------------------------------------------|:-----------------------------------------------------------------------------------------|
  +| 4.x | | `juice-shop-<version>_node4_windows_x64.zip`, `juice-shop-<version>_node4_linux_x64.tgz` |
  +| __6.x__ | __`latest`__ (current official release), `snapshot` (preview from `develop` branch) | `juice-shop-<version>_node6_windows_x64.zip`, `juice-shop-<version>_node6_linux_x64.tgz` |
  +| 8.x | | `juice-shop-<version>_node8_windows_x64.zip`, `juice-shop-<version>_node8_linux_x64.tgz` |
  ## Preview [![Heroku](https://heroku-badge.herokuapp.com/?app=juice-shop)](https://juice-shop.herokuapp.com)
  