Introduction
In this tutorial, we will walk you through the process of cloning a "Nest.js demo" project, setting up a development environment, creating a Docker image for your project, and finally pushing the image to Docker Hub. By following these steps, you'll be able to containerize your Nest.js application and share it with others.
Step 1: Clone the Nest TypeScript Starter Project
First, let's get started by cloning the Nest TypeScript Starter project to your local computer. Open your terminal and run the following command:
git clone https://github.com/nestjs/typescript-starter.git nest-typescript-starter
Once the repository is cloned, navigate into the project directory:
cd nest-typescript-starter
Now, let's install the project dependencies and run the application to ensure it's working as expected:
npm install
npm run start
You should see your Nest.js application up and running locally. You can access it in your browser by navigating to http://localhost:3000.
Step 2: Create a Docker Image
To containerize your Nest.js application, you'll need to create a Docker image. To get started, make sure you have Docker installed on your machine. Create a file named Dockerfile in your project directory. You can use a text editor or run the following command to create it:
touch Dockerfile
Now, open the Dockerfile in your text editor and add the following content:
# Use the official Node.js 16 image as the base image
FROM node:16
# Set the working directory inside the container
WORKDIR /app
# Copy package.json and package-lock.json to the container
COPY package*.json ./
# Install project dependencies
RUN npm install
# Copy the rest of the application source code to the container
COPY . .
# Expose the port your Nest.js application is listening on
EXPOSE 3000
# Command to start your Nest.js application
CMD [ "npm", "run", "start:prod" ]
Next, create a .dockerignore file in your project directory to specify which files and directories should be ignored when copying files to the Docker image. You can use a text editor or run the following command to create it:
touch .dockerignore
Add the following content to your .dockerignore file:
node_modules
npm-debug.log
Step 3: Create and Test the Docker Image
Before pushing the Docker image to Docker Hub, let's test it locally to ensure everything works as expected. Build the Docker image by running the following command in your project directory:
docker build -t nest-app .
This command builds the Docker image with the tag nest-app. After the build is complete, you can run the Docker container using the following command:
docker run -p 3000:3000 nest-app
You should see your Nest.js application running inside a Docker container. You can access it in your browser by navigating to http://localhost:3000.
Step 4: Push the Docker Image to Docker Hub
To share your Docker image with others, you can push it to Docker Hub. First, log in to your Docker Hub account using the docker login command:
docker login
Enter your Docker Hub username and password when prompted.
Now, tag your Docker image with your Docker Hub username and the repository name you want to use. Replace your-username and your-repo-name with your actual Docker Hub username and repository name:
docker tag nest-app your-username/your-repo-name:latest
Finally, push the Docker image to Docker Hub:
docker push your-username/your-repo-name:latest
Your Nest.js Docker image is now available on Docker Hub and can be pulled by others using the docker pull command.
Conclusion
In this tutorial, we've successfully cloned a Nest TypeScript Starter project, created a Docker image for the application, tested it locally, and pushed it to Docker Hub. This allows you to easily share your Nest.js application as a containerized image with others.
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