Update dependencies and improve build system

service/utils/loadEnv.js

@@ -0,0 +1,39 @@
+'use strict'
+
+const path = require('path')
+const dotenv = require('dotenv')
+const dotenvExpand = require('dotenv-expand')
+const { error } = require('./logger')
+
+module.exports = function loadEnv(mode) {
+  const basePath = path.resolve(process.cwd(), `.env${mode ? `.${mode}` : ``}`)
+  const localPath = `${basePath}.local`
+
+  const load = (envPath) => {
+    try {
+      const env = dotenv.config({ path: envPath, debug: process.env.DEBUG })
+      dotenvExpand(env)
+    } catch (err) {
+      // only ignore error if file is not found
+      if (err.toString().indexOf('ENOENT') < 0) {
+        error(err)
+      }
+    }
+  }
+
+  load(localPath)
+  load(basePath)
+
+  // by default, NODE_ENV and BABEL_ENV are set to "development" unless mode
+  // is production or test. However the value in .env files will take higher
+  // priority.
+  if (mode) {
+    const defaultNodeEnv = mode === 'production' || mode === 'test' ? mode : 'development'
+    if (process.env.NODE_ENV == null) {
+      process.env.NODE_ENV = defaultNodeEnv
+    }
+    if (process.env.BABEL_ENV == null) {
+      process.env.BABEL_ENV = defaultNodeEnv
+    }
+  }
+}