Dockerfile
Definition
A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image.
This script-like file outlines a series of instructions, executed sequentially, to build a container image. Each instruction creates a layer in the image, resulting in a reproducible and portable software package. It specifies the base operating system, the installation of software, the copying of application files, and the commands to run when a container is started from the image.
For example, a Dockerfile might include instructions to:
FROM ubuntu:latest(Specify the base image)RUN apt-get update && apt-get install -y nginx(Install software)COPY . /app(Copy application code)CMD ["nginx", "-g", "daemon off;"](Define the default command to execute)
This term is commonly used in the field of software development, containerization, and cloud-native computing.