Bootstrap 5 Contact Form with Node.js

            NODE_ENV=development
            PORT=3000
            MAIL_USERNAME=your_smtp_email_address
            MAIL_PASSWORD=your_smtp_email_password
            MAIL_HOST=your_smtp_host
            MAIL_PORT=your_smtp_port
            MAIL_TO=email_address_to_which_you_want_mails_to_be_sent
          

            NODE_ENV=development
            PORT=3000
            MAIL_USERNAME=your_email_address_here
            MAIL_PASSWORD=your_email_password
            MAIL_HOST=smtp.gmail.com
            MAIL_PORT=465
            MAIL_TO=email_address_to_which_you_want_mails_to_be_sent
          

            require('dotenv').config();

            module.exports = {
              PORT: process.env.PORT || 3000,
              NODE_ENV,
              MAIL_HOST: process.env.MAIL_HOST,
              MAIL_PORT: process.env.MAIL_PORT,
              MAIL_USERNAME: process.env.MAIL_USERNAME,
              MAIL_PASSWORD: process.env.MAIL_PASSWORD,
              MAIL_TO: process.env.MAIL_TO
            };

          

            const express = require("express");
            const multer = require("multer");
            const cors = require("cors");
            const config = require("./config");
            const routes = require("./routes");

            const upload = multer();
            const app = express();

            app.use(cors());
            app.use(upload.none());

            app.use("/api", routes);

            app.listen(config.PORT, () => {
              console.log(`Server is running on port ${config.PORT}.`);
            });

          

            const router = require("express").Router({ mergeParams: true });
            const contactRoutes = require("./contact.routes");

            router.use("/contact", contactRoutes);

            module.exports = router;
          

            // express server specific imports
            const router = require("express").Router({ mergeParams: true });

            // import for contact form routes controller
            const { ContactController } = require("../controllers/contact.controller");

            router.post("/", (req, res) => {
              const controller = new ContactController(req, res);
              controller.sendContactForm();
            });

            module.exports = router;
          

            const nodemailer = require("nodemailer");

            const { MAIL_HOST, MAIL_PORT, MAIL_PROVIDER, MAIL_USERNAME, MAIL_PASSWORD, MAIL_TO } = require('../config');

            const transporter = nodemailer.createTransport({
              host: MAIL_HOST,
              port: MAIL_PORT,
              auth: {
                user: MAIL_USERNAME,
                pass: MAIL_PASSWORD,
              },
            });

            class ContactController {
              constructor(request, response) {
                this.request = request;
                this.response = response;
              }

              sendContactForm() {

                const { name, email, subject, message, mailCopy } = this.request.body;

                const mailOptions = {
                  to: [MAIL_TO], // Enter here the email address on which you want to send emails from your customers
                  from: name,
                  subject,
                  text: message,
                };

                if (mailCopy) {
                  mailOptions.to.push(email);
                }

                transporter
                  .sendMail(mailOptions)
                  .then(() => {
                    return this.response
                      .status(200)
                      .json({ msg: "Email sent successfully" });
                  })
                  .catch((error) => {
                    return this.response
                      .status(400)
                      .json({ errors: [{ msg: `Something went wrong: ${error}` }] });
                  });
              }
            }

            module.exports = ContactController;
          

            const { body, validationResult } = require("express-validator");

            module.exports = [
              body("name").notEmpty().withMessage("You must supply a name"),
              body("email").isEmail().normalizeEmail().withMessage("Email is not valid"),
              body("subject").notEmpty().withMessage("You must supply a subject"),
              body("message").notEmpty().withMessage("You must supply a message"),
              body("mailCopy").toBoolean(),
              function (req, res, next) {
                const errors = validationResult(req);

                if (!errors.isEmpty()) {
                  return res.status(400).json({ errors: errors.array() });
                }

                next();
              },
            ];
          

            // express server specific imports
            const router = require("express").Router({ mergeParams: true });

            // import validation middleware
            const validate = require("../middleware/validate");

            // import for contact form routes controller
            const { ContactController } = require("../controllers/contact.controller");

            // add validator to the route callback
            router.post("/", validate, (req, res) => {
              const controller = new ContactController(req, res);
              controller.sendContactForm();
            });

            module.exports = router;
          

            "start": "node server.js",
            "start:dev" : "nodemon server.js"
          

            npm install nodemon --save-dev