1.7.0

1.7.0 - 2017-06-08

General

• Fixes issue in kit/lib/env.js, where isProduction was always returning false

Docker

• Adds Dockerfile, for building a production web server Docker image
• Adds .dockerignore, copied from the existing .gitignore to avoid unnecessary build context

NPM

• Removes yarn.lock -- the official advice is to avoid Yarn at present, due to certain third-party NPM packages relying on 'postinstall' hooks to build binaries from source
• Adds package-lock.json, for faster builds with NPM v5
• Explicitly adds iltorb and node-zopfli, binary packages required for Brotli and Zopfli compression respectively
• Adds packages:
  "iltorb": "^1.3.1"
  "node-zopfli": "^2.0.2"