Create search endpoint w/ ES

[brishin]

Expose elasticseach (full text) endpoint through the data API with proper rate limitations, etc.

[natebrennand]

This involves integrating Elastic Search with the Courses table. There are some libraries that we can look into using.

This endpoint should be able to be covered by the rate limiting mechanism.

[brishin]

Alternatively, we can reverse proxy through the webapp as a basic solution.

[parthibanloganathan]

@natebrennand I'll take this