Ensure invocation image has been build before running make command

[glours]

As a potential contributor of Docker App I want to run make or make all on docker-app source code without having errors during the end-to-end tests phase

- What I did Add a build of the invocation image if needed - How I did it Check if the image is already present & if not build it - How to verify it

• remove all the docker/cnab-app-base images
• run a make command
• check the image is building before executing tests
• re-run a make command
• check the image isn't build again

- A picture of a cute animal (not mandatory but encouraged)

[glours]

I'm not a Makefile expert too 😅

[ndeloof]

I'm not a Makefile expert too sweat_smile

nobody is

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@b118ccd). Click here to learn what that means. The diff coverage is n/a.

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  Coverage          ?   72.4%           
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  Hits              ?    1866           
  Misses            ?     477           
  Partials          ?     234

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[GordonTheTurtle]

Please sign your commits following these rules: https://github.com/moby/moby/blob/master/CONTRIBUTING.md#sign-your-work The easiest way to do this is to amend the last commit:

$ git clone -b "suitable_error_4_unknown_command" git@github.com:glours/app.git somewhere
$ cd somewhere
$ git rebase -i HEAD~842354506960
editor opens
change each 'pick' to 'edit'
save the file and quit
$ git commit --amend -s --no-edit
$ git rebase --continue # and repeat the amend for each commit
$ git push -f

Amending updates the existing PR. You DO NOT need to open a new one.