server.js

const express = require('express');
const app = express();
const data = require('./data.json');

app.use(express.json());

app.get("/clients", function(request, response) {
    response.json(data);
});

app.get("/clients/:id", function(request, response) {
    const { id } = request.params;
    const client = data.find(cli => cli.id == id);

    if(!client) return response.status(204).json();

    response.json(client);
});

app.post("/clients", function(request, response) {
    const { name, email } = request.body;
    // Save

    response.json({ name, email });
});

app.put("/clients/:id", function(request, response) {
    const { id } = request.params;
    const client = data.find(cli => cli.id == id);

    if(!client) return response.status(204).json();

    const { name } = request.body;

    client.name = name;

    response.json(client);
});

app.delete("/clients/:id", function(request, response) {
    const { id } = request.params;
    const clientsFiltered = data.filter(client => client.id != id);

    response.json(clientsFiltered);
});

app.listen(3000, function(){
    console.log("Server is running [http://localhost:3000/clients]");
});