- Re-organized and documented make targets.
- Parameterized the make targets to more cleanly support multiple
development scenarios.
- Documented the different development scenarios in a README.
- Standardized the host port used when running locally.
- Updated DEV and PROD database config files to match current practice.
- Renamed `personal_measure_api.config.prod.json` to
`personal_measure_api.config.docker.json` to more accurately reflect
that this is the config used when building the docker image
(regardless of which env it ends up in).
