Changing behavior when starting a container
Let's see how the ENV Dockerfile instruction works in practice. We've added a Dockerfile to your current working directory with the following instructions:
FROM ubuntu:22.04
ENV NAME=Tim
CMD echo "Hello, my name is $NAME"
The Dockerfile will print a personalized message, Hello, my name is Tim
, on startup. Let's see how we can change this personalized message even after building an image from the Dockerfile.
This exercise is part of the course
Introduction to Docker
Hands-on interactive exercise
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