chore: update node version to 14

DEVELOPMENT.md

@@ -3,7 +3,7 @@
 Please also read the [CONTRIBUTING.md](CONTRIBUTING.md).
 
 ## Dev requirements
- * Node >= 8 (Development/Building only)
+ * Node >= 14 (Development/Building only)
    * Including npm
  * Yarn (Development/Building only)
  * PHP Composer (Development/Building only)

docker/nginx/Dockerfile

@@ -4,7 +4,7 @@ ENTRYPOINT /entrypoint.sh
 RUN mkdir -p /var/www/public/ && touch /var/www/public/index.php
 COPY docker/nginx/nginx.conf /etc/nginx/nginx.conf
 
-FROM node:10-alpine as themes
+FROM node:14-alpine as themes
 WORKDIR /app
 COPY .babelrc .browserslistrc package.json webpack.config.js yarn.lock /app/
 RUN yarn install