Install Atlas in Coordinator's Docker container (#1472)

## Description of changes

*Summarize the changes made by this PR.*
 - Improvements & Bug fixes
- Install Atlas in the Coordinator's Docker container and copy the
migrations. This makes it easy to run migrations before deploys.
	 - Removed bash autocomplete from the Coordinator's Dockerfile.

## Test plan
*How are these changes tested?*

- [x] Tests pass locally with `pytest` for python, `yarn test` for js
- [x] Manually built the image, ran it, and ran migrations against a
fresh database running locally in postgres

## Documentation Changes
*Are all docstrings for user-facing APIs updated if required? Do we need
to make documentation changes in the [docs
repository](https://github.com/chroma-core/docs)?*

go/coordinator/Dockerfile

@@ -12,12 +12,20 @@ FROM alpine:3.17.3
 
 RUN apk add --no-cache bash bash-completion
 
+# As of 6 Dec 2023, the atlas package isn't in Alpine's main package manager, only
+# testing. So we have to add the testing repository to get it.
+RUN apk add \
+    --no-cache \
+    --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+    --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
+    atlas
+
 RUN mkdir /chroma-coordinator
 WORKDIR /chroma-coordinator
 
 COPY --from=build /src/chroma-coordinator/bin/chroma /chroma-coordinator/bin/chroma
 ENV PATH=$PATH:/chroma-coordinator/bin
 
-RUN chroma completion bash > ~/.bashrc
+COPY --from=build /src/chroma-coordinator/migrations /chroma-coordinator/migrations
 
 CMD /bin/bash