move socket path to env

apps/block_scout_web/assets/js/socket.js

@@ -1,7 +1,7 @@
 import { Socket } from 'phoenix'
 import { locale } from './locale'
 
-const socket = new Socket('/socket', { params: { locale: locale } })
+const socket = new Socket(process.env.SOCKET_ROOT + '/socket', { params: { locale: locale } })
 socket.connect()
 
 export default socket

apps/block_scout_web/assets/webpack.config.js

@@ -5,6 +5,7 @@ const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin')
 const CopyWebpackPlugin = require('copy-webpack-plugin')
 const { ContextReplacementPlugin } = require('webpack')
 const glob = require('glob')
+const webpack = require('webpack')
 
 function transpileViewScript(file) {
   return {
@@ -136,7 +137,10 @@ const appJs =
         filename: '../css/[name].css'
       }),
       new CopyWebpackPlugin([{ from: 'static/', to: '../' }]),
-      new ContextReplacementPlugin(/moment[\/\\]locale$/, /en/)
+      new ContextReplacementPlugin(/moment[\/\\]locale$/, /en/),
+      new webpack.DefinePlugin({
+        'process.env.SOCKET_ROOT': JSON.stringify(process.env.SOCKET_ROOT || '')
+      })
     ]
   }