update env dependencies and Docker build

Dockerfile.production

@@ -1,4 +1,5 @@
 FROM node:erbium-alpine as build-stage
+RUN apk add python2
 WORKDIR /app
 COPY package.json .
 RUN yarn

config/index.js

@@ -26,7 +26,7 @@ module.exports = {
   dev: {
     env: require('./dev.env'),
     port: 8080,
-    autoOpenBrowser: true,
+    autoOpenBrowser: false,
     assetsSubDirectory: 'static',
     assetsPublicPath: '/',
     proxyTable: {},

package.json

@@ -44,8 +44,8 @@
     "friendly-errors-webpack-plugin": "^1.6.1",
     "html-webpack-plugin": "^2.30.1",
     "http-proxy-middleware": "^0.17.4",
-    "node-sass": "^4.13.1",
-    "opn": "^5.1.0",
+    "node-sass": "4.13.0",
+    "opn": "^5.5.0",
     "optimize-css-assets-webpack-plugin": "^3.2.0",
     "ora": "^1.3.0",
     "rimraf": "^2.6.2",