如何将 MERN 堆栈部署到托管服务？

Question

I am new to web development and I have a hosting service on which I want to deploy my reactjs/node project. To deploy it previously, I had been simply uploading the build folder created from running npm run build . I have since added a connection to a mongodb database using the MERN stack.

The project was initially created using create-react-app, then I set up my backend node/mongodb following this tutorial: https://appdividend.com/2018/11/11/react-crud-example-mern-stack-tutorial/ . All of my server code is contained within the project folder in an api folder.

I am able to run the project on local host by running npm start , nodemon server.js (from the api folder) and connecting to the mongodb in terminal. When I try to run it from the hosting service in the same way I did previously, it says it cannot connect to the database, which I assume is due to the fact that the connection is not open on my machine.

Currently, all the API calls are using axios post to http://localhost:4000/ , which I would also assume will not work on the server. I have looked online for information regarding deploying the MERN stack, but all of the ones I have found discuss it in terms of hosting on AWS EC2, which is not what I will be doing.

How would I be able to deploy to my hosting service? Are there any references or places I should look for this information?

Edit: I have connected to the database using MongoAtlas, so am using a SRV address. I think the issue is the axios posts using the localhost address, as the app on the server only works if I have nodemon running on my local machine. What address should I use instead of this?

Answer 1

Currently, all the API calls are using axios post to http://localhost:4000/ , which I would also assume will not work on the server.

You're correct, that will not work. That's because if users get your React app , all API calls will be redirect to their localhost . Which doesn't hold your API

When I try to run it from the hosting service in the same way I did previously, it says it cannot connect to the database, which I assume is due to the fact that the connection is not open on my machine.

That is probably because the MongoDB URL is probably still set to something like 'mongodb://localhost:27017/myapp . There are 2 main options here.

1. Use a "database hosting service" like MongoDB Atlas , you will then need to change your database's URL to point to the one provided by the service
2. Host the database on your server , which will work with the localhost URL

I have looked online for information regarding deploying the MERN stack, but all of the ones I have found discuss it in terms of hosting on AWS EC2, which is not what I will be doing.

• Any server where you have control and flexibility will work in this scenario. You can host all your stuff (server, front-end and database) on it if you want. EC2 can do all of that but it's not your only option. You can also check out similar products from Microsoft and Google, etc...
• Another way to go is to deploy each artifact separately which is more scalable but also introduces its own complexity. If you're going this way you may want to look into Docker containers and Kubernetes which are useful to orchestrate distributed systems

Edit

Since you're using MongoDB Atlas make sure you white-listed the IP adress of your server

Answer 2

On the front-end, you'll want to set up an axios configuration that'll point to the correct URL based upon the running environment:

utils/axiosConfig.js (I like using the name app to keep it inline with express , but you can name it whatever)

import axios from 'axios';

const env = process.env.NODE_ENV; // current environment

export const app = axios.create({
  baseURL:
    env === 'production'
      ? 'http://example.com/api/' // production
      : 'http://localhost:5000/api/', // development
});

Then you can utilize this configuration wherever you do an API call:

import { app } from '../utils/axiosConfig.js';

app.get("example");
app.post("example");
...etc

Now, it can send requests to http://localhost:5000/api/example or http://example.com/api/example .

In your client package.json, you can specify the environment:

 "scripts": {
    "start": "NODE_ENV=development webpack-dev-server",
    "build": "NODE_ENV=production webpack",
    "stage": "NODE_ENV=staging webpack",
    "test": "NODE_ENV=testing jest --watchAll --coverage",
  },

Answer 3

Well, yes you will have to deploy your service oa hosting (already established). There are multiple solutions you can look into there is Digital Ocean Look at these few links

how to setup nodejs app for prod

how to install mongodb on ubuntu

Also there is Heroku. for that there's a complete tutorial for that here

prepare and deploye mern stack .

As I said, there are multiple solutions other than these as well. Hope this helps

Answer 4

TLDR;

In order to run nodejs based apps you'd need to have your own server.

Details

You probably have shared hosting plans and most of them do not offer several third party and open source projects. (nodejs or docker)

For startups, I'd recommend to look into

1. How you can get a managed VPS (virtual private server) that offer docker containers. Wrap your app in a docker container and upload it to your server. (Amazon, Azure etc).

2. Other cheaper options are to get an unmanaged VPS where you would have to install OS yourself, install dependencies, DB, Firewall etc). Don't get scared by their names.

3. Buy a dedicated server machine, install all the stuff required, apply for a static IP point your domain to your static IP.

The third option is scalable and cheaper in the long run but it is a good thing to learn few things about servers and their complications.