Use custom Solr docker image and remove solr_wrapper

[eliotjordan]

• Creates a custom Solr image that allows installation of CJKFoldingFilter and lucene-umich-solr-filters plugins and bundles a dummy authentication document.

See:
https://github.com/pulibrary/ci-solr-docker
https://hub.docker.com/repository/docker/pulibrary/ci-solr
https://hub.docker.com/repository/docker/pulibrary/orangelight-solr

• Modernizes the CircleCI config and adds a separate rubocop job
• Removes solr_wrapper dependency
• Adds checked-in copy of solr configuration for convenience

Closes #2364

[tpendragon]

I am so, so excited about this. How does the docker image get built and pushed to docker hub?

[eliotjordan]

@tpendragon DockerHub used to watch your repos and rebuild automatically, but that's now a paid-only option. :( You have to do it manually, but it's easy:

cd solr/docker/
docker login # login to docker hub
docker build -t pulibrary/orangelight-solr:8.4 .
docker push pulibrary/orangelight-solr:8.4

[tpendragon]

@eliotjordan Can you add that documentation to ci-solr-docker? I wonder if someday we can make CircleCI build and push it on merge to master - not important for now, though.

[coveralls]

Coverage remained the same at 96.915% when pulling 75a79ac on 2364-solr into 1a5d4d3 on main.

[eliotjordan]

@tpendragon Added those instructions to the ci-solr-docker README.

[tpendragon]

I guess the only concern I have is that now CI won't be testing the latest version of what's in pul_solr, since the files are committed. Do you have any worries there?

[eliotjordan]

I don't. The schema doesn't change that often, and it's easy to pull in with a rake task. We do this in other projects, and it's never been a problem.