104 lines
2.2 KiB
Markdown
104 lines
2.2 KiB
Markdown
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---
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title: Running a NodeJS application in Docker
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description: Guide for running a NodeJS application in Docker
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published: true
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date: 2023-06-28T20:38:30.081Z
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tags: nodejs, docker
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editor: markdown
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dateCreated: 2023-06-28T20:38:59.640Z
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---
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# Running a NodeJS application in Docker
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We will be using the guide [Creating a Simple REST API](/guides/nodejs/pages/creating-a-simple-rest-api) as the example application.
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## Prerequisites
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- Docker installed
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- Docker Compose installed
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## Get Started
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1. First we need to create a new file called `Dockerfile`.
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2. Next, we need to open the `Dockerfile` file and add the following code:
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```dockerfile
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FROM node:latest
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WORKDIR /app
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COPY package*.json ./
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RUN npm install
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COPY . .
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EXPOSE 3000
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CMD ["node", "index.js"]
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```
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3. Now we can move on to the `docker-compose.yml` file. We need to create a new file called `docker-compose.yml`.
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4. Next, we need to open the `docker-compose.yml` file and add the following code:
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```yaml
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version: "3.9"
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services:
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nodejs_rest_api:
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build: .
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restart: unless-stopped
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ports:
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- "3000:3000"
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```
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This will create a new service called `nodejs_rest_api` and build the Docker image using the `Dockerfile` in the current directory.
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5. You can now copyy the project files to where you want to run the application.
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6. Next, we need to open the terminal and run the following command:
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```bash
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docker-compose up -d
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```
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This will start the application in the background.
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7. Next, we need to open a web browser and navigate to `http://server_ip:3000`.
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You should now see your application running.
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## Updating the application
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1. First we need to open the terminal and run the following command:
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```bash
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docker-compose down
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```
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This will stop the application.
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2. Next, we need to update the application files. You can do this by copying the updated files to the server.
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3. Next, we need to open the terminal and run the following command:
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```bash
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docker-compose build
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```
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This will re-build the Docker image.
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4. Next, we need to open the terminal and run the following command:
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```bash
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docker-compose up -d
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```
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This will start the application in the background again.
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## Finished
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You have now successfully created a NodeJS application and run it in Docker and know how to update it.
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