How to Dockerize Next.Js App?

28 minutes read

Next.js is a React framework for building server-side rendered (SSR) and statically generated web applications. It is built on top of React and Node.js, providing several features like automatic code splitting, server-side rendering, static site generation, and client-side routing. It aims to simplify the development of complex React applications by providing a structured and optimized framework. Next.js also supports built-in CSS and Sass styling solutions, as well as built-in API routes to handle backend logic. Overall, Next.js is a powerful tool for building modern web applications with React.

What is the Docker?

Docker is an open-source platform that automates the deployment, scaling, and management of applications within software containers. It allows developers to package an application and its dependencies into a container that can be consistently run on any system, ensuring that the application works seamlessly across different environments. Docker containers provide a lightweight, portable, and isolated environment for running applications, enabling easier deployment and faster development workflows.

How to Dockerize Next.Js App?

To Dockerize a Next.js app, follow these steps:

  1. Create a Dockerfile in the root directory of your project.
  2. Specify the base image you want to use. For example, you can use the official Node.js image: FROM node:14
  3. Set the working directory in the container: WORKDIR /app
  4. Copy the package.json and package-lock.json files to the container: COPY package*.json ./
  5. Install the dependencies: RUN npm ci
  6. Copy the rest of the application code to the container: COPY . .
  7. Build the Next.js app: RUN npm run build
  8. Expose the necessary port (default is 3000) so that it can be accessed from outside the container: EXPOSE 3000
  9. Start the Next.js app: CMD ["npm", "start"]
  10. Save and close the Dockerfile.
  11. Build a Docker image using the Dockerfile: docker build -t my-next-app .
  12. Run a Docker container based on the image: docker run -p 3000:3000 my-next-app
  13. Open a web browser and navigate to http://localhost:3000 to access the Next.js app.

Note: Make sure you have Docker installed and running on your machine.

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