Dockerfile

Dockerfiles are text files that contain instructions to build Docker images. Docker is a popular platform for developing, shipping, and running applications inside containers. A Dockerfile typically consists of a set of instructions that specify how to assemble a Docker image. These instructions include actions such as copying files into the image, installing dependencies, setting environment variables, and defining how the container should run.

👉 Best practices for Dockerfile instructions

To ensure your Dockerfile is well-structured, efficient, and produces secure and maintainable Docker images, it’s important to follow best practices for each Dockerfile instruction. Here are some guidelines for common Dockerfile instructions:

1. FROM: This is the starting point for the image. For example, FROM ubuntu:latest specifies that the image will be based on the latest version of the Ubuntu operating system.

• Use official base images whenever possible from a reputable source like Docker Hub.
• Specify a specific version tag rather than using latest to ensure reproducibility.
• Choose a base image that matches the requirements of your application.

2. RUN: Executes commands inside the container during the image build process. For example, RUN apt-get update && apt-get install -y nginx…