Hosting

npx create-react-app myapp

open https://firebase.google.com/

Create New Project in firebase

Add Project -> input name Project -> Continue

back your Visual Studio Code

install firebase tools cli

npm install -g firebase-tools

in terminal input firebase login

if you haven't login , login with your google account in web

input firebase init

follow the steps

space to input checkbox and enter

if you have to create the project in firebase (STEP 1)

follow the step click enter

open firebase.json

change the code

to

{
  "hosting": {
    "public": "build",
    "ignore": [
      "firebase.json",
      "*/.",
      "/node_modules/"
    ],
    "rewrites": [ {
    "source": "**",
    "destination": "/index.html"
      }, {
    "source": "/foo{,/**}",
    "destination": "/index.html"
      }, {
    "source": "!/@(js|css)/**",
    "destination": "/index.html"
      } ]
    }    
}

next input firebase init in terminal

input "build" in your terminal , next step click enter until finished

if finished "npm run build" in your terminal

finally "firebase deploy" input your terminal

YOUR WEB URL