Reorganizing Project Layout

[khaines]

The Focus of this PR is to reorganize the project files closer to guidance found here: https://github.com/golang-standards/project-layout

It is not a perfect shift, but this should be the largest move of files, so I wanted to get the PR in as it is.

• Go is now set to 1.17
• Combines project to a single go module, vs many.
• The executable packages (containing a main.go file) have been moved under the /cmd directory.
• Referenced libraries, have been moved to the /pkg directory. There is code in the executable packages, which can be placed in a sharable reference package; these will be moved in a future PR.
• MAKEFILE has been updated to automatically detect the presence of a Dockerfile at build time and create the corresponding container, removing the need to hardcode docker build commands for each one.
• Moved common build steps to a parent "build" container, which will prep the space for each application to be build and avoids duplication of copying common files to a container.

[dgkanatsios]

Great work, thanks! I'll post here with findings :) Repo has a VS Code workspace, which IIRC was needed since there were multiple Go apps. Do we need it now that we have a single go.mod file?