[PERF]: Optimized docker image

[tazarov]

Description of changes

Summarize the changes made by this PR.

• Improvements & Bug fixes
  • Removed the re-download of hnsw in docker entrypoint
    • Removed build dependencies in final image to reduce size (by about 100M)
    • Added flag for rebuilding hnsw lib from source
    • Added docs how to build in image with hardware-optimized hnsw

Test plan

How are these changes tested?

• Tests pass locally with pytest for python, yarn test for js

Documentation Changes

Example of building AVX-optimized image added under examples/.

[github-actions]

Reviewer Checklist

Please leverage this checklist to ensure your code review is thorough before approving

Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)

[HammadB]

this is great, thanks

[beggers]

Could we make it default to true to keep current behavior in the default case? Seems like a very reasonable arg to expose.

[tazarov]

Could we make it default to true to keep current behavior in the default case? Seems like a very reasonable arg to expose.

The only reason I didn't make it default is that our images are built on GH runners, which are running on Intel Xeon, which does have AVX enabled, so the rebuilt lib inside the docker will not work on non-AVX machines. May be I'm missing something though

[tazarov]

@beggers, can you take another look here and get this merged?

[beggers]

This looks good to me but @HammadB is more knowledgable about these dark arts than I.