What is the purpose of a Dockerfile in Docker?

Problem Statement

Explanation

A Dockerfile is a text file containing instructions (FROM, COPY, RUN, CMD etc) which Docker uses to build an image layer by layer. It defines how the image is constructed. This supports reproducible builds and versioning. :contentReference[oaicite:4]{index=4}

Code Solution

SolutionRead Only

FROM node:14
WORKDIR /app
COPY . .
RUN npm install
CMD ["node","index.js"]

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Docker Basics & Core Concepts

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What is the purpose of a Dockerfile in Docker?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

What is the purpose of a Dockerfile in Docker?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

What is the primary purpose of using Docker?

How does a Docker container differ from a virtual machine (VM)?

Which of the following are the main components of Docker’s architecture?

Which command lists all containers including stopped ones?

Explain the difference between a Docker image and a Docker container.

More from Docker & Kubernetes

Master Interviews
Anywhere, Anytime