My react project not working after deploy to firebase hosting

I'm following the instruction of this site and I'm already trying with an empty create-react-app project and It's working fine

But when I'm trying with my existing project after deploy process was done It said

Firebase Hosting Setup Complete You're seeing this because you've successfully setup Firebase Hosting. Now it's time to go build something extraordinary!

So I'm pretty curious what I missing

here's package.json

{
  "name": "iplace",
  "version": "0.1.0",
  "private": false,
  "dependencies": {
    "node-sass": "^4.10.0",
    "react": "^16.6.3",
    "react-dom": "^16.6.3",
    "react-router": "^4.3.1",
    "react-router-dom": "^4.3.1",
    "react-scripts": "2.1.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": [
    ">0.2%",
    "not dead",
    "not ie <= 11",
    "not op_mini all"
  ]
}

firebase.json

{
  "hosting": {
    "public": "build",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**"
    ],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  }
}

I already execute firebase init (change public-> build) > npm run build > firebase deploy

Here's project structure

And here's index.html file (I'm pretty wonder why index.html still have welcome to firebase wording...)

<!doctype html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Welcome to Firebase Hosting</title><script defer="defer" src="/__/firebase/5.7.0/firebase-app.js"></script><script defer="defer" src="/__/firebase/5.7.0/firebase-auth.js"></script><script defer="defer" src="/__/firebase/5.7.0/firebase-database.js"></script><script defer="defer" src="/__/firebase/5.7.0/firebase-messaging.js"></script><script defer="defer" src="/__/firebase/5.7.0/firebase-storage.js"></script><script defer="defer" src="/__/firebase/init.js"></script><style media="screen">body{background:#eceff1;color:rgba(0,0,0,.87);font-family:Roboto,Helvetica,Arial,sans-serif;margin:0;padding:0}#message{background:#fff;max-width:360px;margin:100px auto 16px;padding:32px 24px;border-radius:3px}#message h2{color:#ffa100;font-weight:700;font-size:16px;margin:0 0 8px}#message h1{font-size:22px;font-weight:300;color:rgba(0,0,0,.6);margin:0 0 16px}#message p{line-height:140%;margin:16px 0 24px;font-size:14px}#message a{display:block;text-align:center;background:#039be5;text-transform:uppercase;text-decoration:none;color:#fff;padding:16px;border-radius:4px}#message,#message a{box-shadow:0 1px 3px rgba(0,0,0,.12),0 1px 2px rgba(0,0,0,.24)}#load{color:rgba(0,0,0,.4);text-align:center;font-size:13px}@media (max-width:600px){#message,body{margin-top:0;background:#fff;box-shadow:none}body{border-top:16px solid #ffa100}}</style><link href="/static/css/main.6f735e8f.chunk.css" rel="stylesheet"></head><body><div id="message"><h2>Welcome</h2><h1>Firebase Hosting Setup Complete</h1><p>You're seeing this because you've successfully setup Firebase Hosting. Now it's time to go build something extraordinary!</p><a target="_blank" href="https://firebase.google.com/docs/hosting/">Open Hosting Documentation</a></div><p id="load">Firebase SDK Loading&hellip;</p><script>document.addEventListener('DOMContentLoaded', function() {
        // // 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
        // // The Firebase SDK is initialized and available here!
        //
        // firebase.auth().onAuthStateChanged(user => { });
        // firebase.database().ref('/path/to/ref').on('value', snapshot => { });
        // firebase.messaging().requestPermission().then(() => { });
        // firebase.storage().ref('/path/to/ref').getDownloadURL().then(() => { });
        //
        // // 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥

        try {
          let app = firebase.app();
          let features = ['auth', 'database', 'messaging', 'storage'].filter(feature => typeof app[feature] === 'function');
          document.getElementById('load').innerHTML = `Firebase SDK loaded with ${features.join(', ')}`;
        } catch (e) {
          console.error(e);
          document.getElementById('load').innerHTML = 'Error loading the Firebase SDK, check the console.';
        }
      });</script><script>!function(l){function e(e){for(var r,t,n=e[0],o=e[1],u=e[2],f=0,i=[];f<n.length;f++)t=n[f],p[t]&&i.push(p[t][0]),p[t]=0;for(r in o)Object.prototype.hasOwnProperty.call(o,r)&&(l[r]=o[r]);for(s&&s(e);i.length;)i.shift()();return c.push.apply(c,u||[]),a()}function a(){for(var e,r=0;r<c.length;r++){for(var t=c[r],n=!0,o=1;o<t.length;o++){var u=t[o];0!==p[u]&&(n=!1)}n&&(c.splice(r--,1),e=f(f.s=t[0]))}return e}var t={},p={2:0},c=[];function f(e){if(t[e])return t[e].exports;var r=t[e]={i:e,l:!1,exports:{}};return l[e].call(r.exports,r,r.exports,f),r.l=!0,r.exports}f.m=l,f.c=t,f.d=function(e,r,t){f.o(e,r)||Object.defineProperty(e,r,{enumerable:!0,get:t})},f.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},f.t=function(r,e){if(1&e&&(r=f(r)),8&e)return r;if(4&e&&"object"==typeof r&&r&&r.__esModule)return r;var t=Object.create(null);if(f.r(t),Object.defineProperty(t,"default",{enumerable:!0,value:r}),2&e&&"string"!=typeof r)for(var n in r)f.d(t,n,function(e){return r[e]}.bind(null,n));return t},f.n=function(e){var r=e&&e.__esModule?function(){return e.default}:function(){return e};return f.d(r,"a",r),r},f.o=function(e,r){return Object.prototype.hasOwnProperty.call(e,r)},f.p="/";var r=window.webpackJsonp=window.webpackJsonp||[],n=r.push.bind(r);r.push=e,r=r.slice();for(var o=0;o<r.length;o++)e(r[o]);var s=n;a()}([])</script><script src="/static/js/1.734eb6b0.chunk.js"></script><script src="/static/js/main.14da6ff9.chunk.js"></script></body></html>