Setup Express backend

back/.babelrc

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+{
+  "presets": [
+    "@babel/preset-env"
+  ]
+}

back/index.js

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+import express from 'express';
+import bodyParser from 'body-parser';
+
+const app = express();
+
+app.listen(5000);

back/package.json

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+{
+  "name": "back",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "nodemon --exec babel-node index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1"
+  },
+  "devDependencies": {
+    "@babel/cli": "^7.5.5",
+    "@babel/core": "^7.5.5",
+    "@babel/node": "^7.5.5",
+    "@babel/preset-env": "^7.5.5",
+    "nodemon": "^1.19.1"
+  }
+}