[REF] Remove container-internal ports and unneeded graph config vars

[alyssadai]

• Closes Reduce the number of configurable options / environment variables to declutter or at least restructure #30
• Related: Investigate a debug recipe that extends the production recipe with extra config options #81

Changes proposed in this pull request:

• The following variables have been removed as .env-configurable options and now have hardcoded values in docker-compose.yml:
  1. NB_GRAPH_ADDRESS
  2. NB_GRAPH_PORT *
  3. NB_GRAPH_IMG
  4. NB_NAPI_PORT *
  5. NB_FAPI_PORT *

(*) Note that the container environment variables corresponding to these options still exist and are still expected/used by scripts within the Compose stack, their port values are just now hardcoded in the container environment

• e.g., setup.sh for the graph looks for the value of an NB_GRAPH_PORT env var; the n-API will use NB_API_PORT from the container environment to determine what port to launch uvicorn on

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• Tests have been added

For bug fixes:

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[surchs]

🎉
🧑‍🍳

[neurobagel-bot]

🚀 PR was released in v0.2.0 🚀