What base image is usually referenced in Dockerfiles for Node.js applications?

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When creating a Dockerfile for a Node.js application, it is common practice to reference the "node" base image. This image is specifically designed for running Node.js applications and comes pre-installed with the necessary Node.js runtime and package manager (npm) needed for building and running Node.js applications. By using the "node" base image, developers can ensure that the environment is optimized for Node.js, which can help avoid compatibility issues and streamline the development process.

Additionally, the "node" base image is available in various versions, allowing developers to choose the specific version of Node.js that their application requires. This flexibility is crucial for maintaining compatibility with existing codebases and dependencies.

Other options like "python," "ubuntu," and "alpine" may be used in different contexts, but they are not tailored specifically for Node.js applications. For instance, "python" would be suitable for Python applications, "ubuntu" serves as a general-purpose operating system image, and while "alpine" is a lightweight image often used for various applications to reduce size, it does not come with Node.js pre-installed. Therefore, using the "node" base image is the most efficient choice for developing and deploying Node.js applications in Docker.

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