Free deployment nodejs

With the popularity of the Internet in recent years, more and more developers have begun to use Node.js to develop web applications. Node.js is a Chrome-based JavaScript running environment that can run JavaScript programs on the server side, allowing developers to use JavaScript language to develop on the server side. In the process of executing a Node.js application, deployment processing is required so that the application can run smoothly. To this end, this article will briefly introduce how to deploy Node.js applications for free.

1. Cloud service provider

If you want to deploy Node.js applications, you cannot do without the help of a cloud service provider. The most common cloud service providers currently on the market include Amazon Web Services, Microsoft Azure and Google Cloud Platform. These cloud service providers can provide the infrastructure and elements you need to deploy Node.js applications.

Amazon Web Services (AWS) is one of the most well-known cloud service providers on the market. AWS can provide you with a variety of computing, storage and database resources. Its Amazon Elastic Compute Cloud (EC2) is a virtual machine that lets you deploy Node.js applications in Amazon Web Service (AWS) and use Amazon S3, a data storage service Stores related files for Node.js applications.

In addition to AWS, there are many other cloud service providers to choose from, and many large technology companies will also provide their own unique cloud services. You can choose according to your own needs.

2. Application Construction

Before deploying a Node.js application, we need to build the application first. If you want to build a Node.js application, you need to choose the NODEJS version that suits you and configure it accordingly according to actual needs.

You need to pay attention to the following points when building a Node.js application:

1. Choose the appropriate PACKAGE.JSON
   First you need to create a PACKAGE.JSON in the project root directory file, which is a JSON file that records basic information about the project and the modules it depends on. It needs to be configured according to the actual situation, such as the project name, version, dependencies and other information. After creation, use the npm init command to initialize a new node.js project.
2. Dependency installation
   For Node.js applications, dependencies are as important as the lifeline. You can install required Node.js module dependencies through npm, such as express and other commonly used modules.
3. Build Command
   You need to create a script command in the PACKAGE.JSON file and specify how to build our application.

{
"name": "my-app",
"version": "1.0.0",
"description": "A sample Node.js app ",
"scripts": {

"start": "node index.js"

},
"dependencies": {

"express": "^4.17.1"

}
}

In the above example, we Created a Node.js application called "my-app" and set its version to "1.0.0". Then we defined a script command "start" and specified the file to be executed as "index.js". Finally, we added a module dependency we need (express) in "dependencies".

3. Application deployment

After completing the construction of the application, we can deploy it to the computer resources provided by the cloud service provider. Most cloud service providers provide virtual machine instances such as EC2. Therefore, when deploying, we need to make some basic settings.

The main points are as follows:

1. Create Instance
   First of all, before using EC2, you need to create an Instance. This Instance can be regarded as a physical machine.
2. Security Group
   Then when creating an Instance, you need to set up a security group. This is an important control method for network security. It can be used to restrict external network traffic accessing the instance, and can be authorized to other services or cloud instances to access specific ports.
3. Log in to the instance
   Next, you need to log in to our Instance. In this step, you need to use the SSH protocol to operate.
4. Installation of Node.js environment
   After logging in to Instance, we first need to install the Node.js environment. You can use the command sudo apt-get update to update our package source, and then use the command sudo apt-get install -y nodejs to install the Node.js environment.
5. Application Deployment
   After installing the Node.js environment, we can deploy the previously built Node.js application. Generally speaking, we use the Git tool to download the application code, and then use the npm command to install the application's dependencies (such as express and other modules). Next, we run the "npm run start" command to start the application.

3. Summary

Node.js is a very popular JavaScript running environment and is widely used in web development. In the process of deploying Node.js applications, we need to rely on the infrastructure provided by various cloud service providers to implement deployment. When building an application, you need to pay attention to issues such as Package.json, dependency installation, and build commands, and make necessary settings and installations during the deployment process to make the application run more stable and secure.

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