Configurable host ports for deployment in shared environments.

[tbnorth]

As a code tester, I want to be able to configure the host ports used by ChemReg components, so I can deploy for testing in a shared environment.

chemcurator_django: 8000 / 8001 hard coded chemcurator_vuejs: no docker-compose.yml resolver: already using env. var. configuration for host port usage

docker-compose lets you use multiple docker-compose.yml files with the --file parameter, but it merges, rather than replaces, ports: sections.

Acceptance:

• all host ports used by ChemReg components are configurable with env. vars.

Test:

• N/A? new env. vars. will be added