update docker image name

[mattdavis0351]

This PR gives the Docker image a more unique name to avoid conflict with other courses that rely on Docker images stored using packages

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[brianamarie]

This change makes sense to me, @mattdavis0351! I trust that you've gone through and tested that it works - do you want someone else to verify this works as a part of the whole course? If not, I think this is good to 🚢!

[mattdavis0351]

@brianamarie @hectorsector I don't have an AWS account setup, could someone that does do a quick run through to make sure this naming change didn't hurt anything

[brianamarie]

@brianamarie @hectorsector I don't have an AWS account setup, could someone that does do a quick run through to make sure this naming change didn't hurt anything

I can go through this on Thursday or Friday, but @hectorsector may be able to get to it sooner 😊

[hectorsector]

This is a simple enough fix, merging and I'm going through the course now anyway for other reasons.