Documentation Updates for newcomers

[NickRycar]

Ran through some suggestions for the README.md provided by @alainlubin and @danf425. Some high-level topics discussed included:

• Make sure the instructions call out running a terraform init on a user's first spin-up, as the terraform apply will fail if this is not done
• Update the sup-log section of local specifying a ctrl+c to exit out when you're done.
• Guidence on working with branches for contributing or working with PRs (this can likely go in a separate CONTRIBUTING.md)

Thinking of using this as a good topic to get some folks together for a quick contributing session to guide folks through the git-fu required to get changes pushed to the repo.