Docker and CI/CD · Junior · Question 20 of 75

In `docker build -t my-app .`, what is the `.`?

✓Correct answer: The build context: files the build can COPY
2A shortcut for the default latest tag
3The directory where the built image is saved

Explanation

The context is packaged and sent to the builder. By default the Dockerfile is looked up there too; -f points to another one.

Further reading

Docker Docs: Build context and .dockerignore ↗

Test yourself

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