Dockerize FastAPI

[chkim-usgs]

Currently, the Dockerfile copies over the SpiceQL/ dir you run the Dockerfile in into the image and spins up the FastAPI.
Changes to be made:

• Change COPY repo to a git clone (pinned, not main branch)
• FastAPI calls results in a connection timed out error, added an nginx.conf to rectify that

Helpful commands:

• Build image: docker build --platform linux/amd64 -t fastapi-image . --progress plain --no-cache
• Create/run container with image: docker run -it --name fastapi --mount type=bind,source=</path/to/local/isis_data>,target=/mnt/isis_data fastapi-image
• Exec into container: docker exec -it fastapi bash

[Kelvinrr]

if we get passing tests for this, let's merge it