possible corrections in server js

.eslintrc

@@ -15,5 +15,7 @@
     "mocha": true
   },
   "extends": ["eslint:recommended", "plugin:react/recommended"],
-  "rules": {}
+  "rules": {
+    "no-console": "warn"
+  }
 }

Procfile

@@ -1 +1 @@
-web: node server.js
+web: node server.js

package.json

@@ -19,7 +19,7 @@
   },
   "license": "ISC",
   "dependencies": {
-    "react": "^15.6.1",
+    "express": "^4.16.2",
     "react-dom": "^15.6.1",
     "react-router-dom": "^4.2.2"
   },
@@ -35,7 +35,6 @@
     "css-loader": "^0.28.5",
     "eslint": "^4.5.0",
     "eslint-plugin-react": "^7.3.0",
-    "express": "^4.15.4",
     "file-loader": "^0.11.2",
     "html-webpack-plugin": "^2.30.1",
     "node-sass": "^4.5.3",

server.js

@@ -1,16 +1,15 @@
-var express = require("express");
+var express = require('express');
 var app = express();
-var path = require("path");
-var publicPath = __dirname + "/dist/";
 
-app.get("/", function(req, res) {
-  res.sendFile(path.join(__dirname + "/dist/index.html"));
-});
+app.set('port', (process.env.PORT || 5000));
+
+app.use(express.static(__dirname + '/dist'));
 
-app.use("/", express.static(publicPath));
 
-app.listen(process.env.PORT || 3000, function() {
-  /* eslint-disable no-console */
-  console.log("Listening on port " + process.env.PORT || 3000);
-  /* eslint-enable no-console */
+app.get('/', function(request, response) {
+  response.render('dist/index');
 });
+
+app.listen(app.get('port'), function() {
+  console.log('Node app is running on port', app.get('port'));
+});

yarn.lock

@@ -2032,7 +2032,7 @@ expand-range@^1.8.1:
   dependencies:
     fill-range "^2.1.0"
 
-express@^4.13.3, express@^4.15.4:
+express@^4.13.3:
   version "4.15.4"
   resolved "https://registry.yarnpkg.com/express/-/express-4.15.4.tgz#032e2253489cf8fce02666beca3d11ed7a2daed1"
   dependencies:
@@ -2065,7 +2065,7 @@ express@^4.13.3, express@^4.15.4:
     utils-merge "1.0.0"
     vary "~1.1.1"
 
-express@^4.15.2:
+express@^4.15.2, express@^4.16.2:
   version "4.16.2"
   resolved "https://registry.yarnpkg.com/express/-/express-4.16.2.tgz#e35c6dfe2d64b7dca0a5cd4f21781be3299e076c"
   dependencies: