- Move away from using multiple images for "quickstart" and instead use a single "integration" image which provides all of the dependencies
- Update `docker-up-vinyldns.sh` to support the new `integration` image
- Update `remove-vinyl-containers.sh` to more cleanly.. clean up
- Update `verify.sh` to more reliably run `sbt` targets
- Update `build/docker/api/application.conf` to allow for overrides and default to the `vinyldns-integration` image
- Update `build/docker/portal/application.conf` to allow overrides and use `vinyldns-integration` image
- Update `build/docker/portal/Dockerfile` to use `vinyldns/build:base-build-portal` to reduce need to download dependencies over and over
- Update `api/assembly` sbt target to output to `assembly` rather than some deeply nested folder in `**/target`
- Update documentation to reflect changes
- Move `docker/` directory to `quickstart/` to reduce confusion with the `build/docker` directory
- Move `bin/` to `utils/` since the files are binaries
- Add `.dockerignore` to root
