server.js

// import Express library and activate it
import express from "express";
const app = express();

// import path module to help with file paths
import path from 'path';

// Serve static files from the 'public' folder
app.use(express.static('public'))

// On Vercel, point the root url (/) to index.html explicitly
if (process.env.VERCEL) {
    app.get('/', (req, res) => {
        res.sendFile(path.join(process.cwd(), 'public', 'index.html'))
    })
}

// publish the current datetime as an API endpoint
app.get("/api/datetime", (req, res) => {
    res.send({
        datetime: new Date()
    })
});


app.get("/api/ethereum", async (req, res) => {

    const today = new Date()
    const monthAgo = new Date()
    monthAgo.setMonth(monthAgo.getMonth() - 1)



    let url = new URL('https://rest.coinapi.io/v1/exchangerate/ETH/CAD/history')
    url.searchParams.set('apikey', process.env.APIKEY)
    url.searchParams.set('period_id', '1DAY')
    url.searchParams.set('time_start', monthAgo.toISOString())
    url.searchParams.set('time_end', today.toISOString())
    url.searchParams.set('limit', 31)

    const response = await fetch(url.href)
    const data = await response.json()
    console.log(data)


    res.send(data)
});


const port = 3000
// Start Express
app.listen(port, () => {
    console.log(`Express is Live at http://localhost:${port}`);
});