Andy Turner

Add note on architecture differences when building containers: ARM v x86

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As the number of attendees using newer Mac models with ARM-based processors increases, the problem of containers built on Macs being incompatible with other (x86-based) systems (and vice-versa) is going...

There aren't solutions or answers for exercises in chapter 7

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Address issue raised in [peer review](https://github.com/carpentries-lab/reviews/issues/15)

Add concrete example tied to research use

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Address issue raised in [peer review](https://github.com/carpentries-lab/reviews/issues/15): > Motivation: It can be beneficial to create a concrete example to develop the exercises for the persona you are developing the lesson for....

Add section on target audience

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Address comment from [peer review](https://github.com/carpentries-lab/reviews/issues/15) > The target audience identified for the lesson is specific and realistic. > I am not sure I saw a section highlighting the target audience,...

Address comment from [peer review](https://github.com/carpentries-lab/reviews/issues/15) > Finding containers on Docker Hub - Is it also possible to talk about container registries like Quay and DockerHub in general before focusing on...

Chapter 5: The objective 'Explain how the Docker Hub augments Docker use' is not clear to me.

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Address issue raised in [peer review](https://github.com/carpentries-lab/reviews/issues/15)

From the lesson [peer review](https://github.com/carpentries-lab/reviews/issues/15) > In chapter 6 there is a title that says 'Boring but important notes about the installation': I think this section is far more important...

From the lesson [peer review](https://github.com/carpentries-lab/reviews/issues/15) > Chapter 9: Something that is interesting regarding Docker container's reproducibility is the use of tags for the base images. You mention how to use...

From the lesson [peer review](https://github.com/carpentries-lab/reviews/issues/15) > Chapter 4: Could be a good moment to check if the students recognized the difference between an image and a running container. I would...

Adds option to specify config location using env variable

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Adds the option to set `CATS_CONFIG_FILE` environment variable to specify config file location. Config file location precedence becomes: 1. Command line option 2. Location specified in `CATS_CONFIG_FILE` 3. `./config.yaml`