[WIP] docker compose commands

[yanxi0830]

What does this PR do?

Docker compose files for spinning up individual services, used for mix-n-match on spinning up distributions.

Feature/Issue validation/testing/test plan

spin up pgvector

cd docker/pgvector
docker compose up

Sources

Please link relevant resources if necessary.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Ran pre-commit to handle lint / formatting issues.
• Read the contributor guideline,
  Pull Request section?
• Updated relevant documentation.
• Wrote necessary unit or integration tests.