CHEATSHEET: Dockerfile - Basic Syntax and Concepts

published on Fri May 15 2020

Instructions

FROM - initializes a new build stage and sets the base image for subsequent instructions
RUN - will execute any commands in a new layer on top of the current image and commit the results which will be used for the next step in the Dockerfile
CMD - used to provide defaults for an executing container such as an executable and its arguments
COPY <src> <dest> - copies new files or directories from <src> and adds them to the filesystem of the container at the path <dest>
WORKDIR - sets the working directory to the specified directory for following instructions in the Dockerfile