Proxy error - Could not proxy request /api/auth from localhost:3000 to localhost:5000

Proxy error: Could not proxy request /api/auth from localhost:3000 to localhost:5000 in reactjs application.

I have searched many options to resolve this proxy issue and finally found a solutions.

Solution for proxy error api request

• Make sure your backend node server is running properly or not.
• To check concurrently configure your client and server.
• Another reason is, when you save something in your client, the backend server also reloads. During that time, it cannot process any requests. So that will add the --ignore client in server/backend package.json,

Sample code snippet

"scripts": {
    "start": "node server",
    "server": "nodemon server --ignore client",
    "client": "npm start --prefix client",
    "dev": "concurrently \"npm run server\" \"npm run client\"",
},

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I learn by breaking stuff (mostly code).