Dockerfile Tutorial by Example Basics and Best Practices 2018

• URL: https://takacsmark.com/dockerfile-tutorial-by-example-dockerfile-best-practices-2018/

  • https://youtu.be/6Er8MAvTWlI
  • https://youtu.be/ZcMr4G5DH7c

• Author: Márk Takács

• Docker files MUST start with FROM but after that you can also add data like:

FROM python:3.9.7
MAINTAINER Bryan Jenks bryan@bryanjenks.dev

• When you build your docker image from a docker file with Build each command in the file create a new image and the layers are plastered on top, but each layer is cached so when you change things iteratively, only the changed items onward get re-ran. Essentially lazy loading.