frontend server target build index

server.js

const express = require("express");
const fs = require("fs");
const path = require("path");
const app = express();
const port = process.env.PORT || 8080;
const filePath = path.resolve(__dirname, "./build", "index.html");

// Home page route
app.get("/", function (request, response) {
  // Read in index.html
  fs.readFile(filePath, "utf8", function (err, data) {
    if (err) return console.log(err);
    // Find and replace strings
    const result = data.replace(/\$OG-TITLE/g, "Home");
    response.send(result);
  });
});

// As above
app.get("/my-fun-route", function (request, response) {
  fs.readFile(filePath, "utf8", function (err, data) {
    if (err) return console.log(err);
    const result = data.replace(/\$OG-TITLE/g, "My fun route");
    response.send(result);
  });
});

app.use(express.static(path.join(__dirname, "build")));

app.get("*", (req, res) =>
  res.sendFile(path.join(__dirname, "build/index.html"))
);

app.listen(port, () => console.log(`Listening on port ${port}`));