Dockerfile and Images

Dockerfile Basics

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LearnStep 1 of 2

Dockerfile Introduction

Learning Objectives

•Understand Dockerfile syntax
•Use basic instructions
•Build your first image

Lesson Outline

LearnStep 1/2

Dockerfile Introduction

Dockerfile Basics

A Dockerfile is a text file with instructions for building Docker images.

Basic Dockerfile

dockerfile

Building the Image

bash

Key Instructions

FROM: Base image to start from
WORKDIR: Set working directory
COPY: Copy files from host to image
RUN: Execute commands during build
EXPOSE: Document which ports are used
CMD: Default command when container starts