server.js

const express = require('express');
const next = require('next');
//const Dagger = require("eth-dagger");

const app = next({
  dev: process.env.NODE_ENV !== 'production'
});
const routes = require('./routes');
const handle = routes.getRequestHandler(app);

app.prepare().then(() => {
  const port = 8000 || process.env.PORT;
  const server = express();
  const Web3 = require('web3');
  const truffle_connect = require('./connection/app.js');
  const bodyParser = require('body-parser');
  server.use(bodyParser.json());

  server.get('*', (req, res) => {
        return handle(req, res)
  });

//  var dagger = new Dagger("mqtts://kovan.dagger.matic.network"); // dagger server


  server.listen(port, () => {

    // fallback - use your fallback strategy (local node / hosted node + in-dapp id mgmt / fail)
    truffle_connect.web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:7545"));

    console.log("Express Listening at http://localhost:" + port);

  });


}).catch((ex) => {
  console.error(ex.stack);
  process.exit(1);
});