I used the clojure cli tools and deps.edn described here rather than leiningen.
clj -M -m gr-interview.core FILE
where FILE is the name of a file to parse/ingest. More than one file can be specified (seperated by spaces)
sample input files are under the resources directory.
clj -X gr-interview.core/start
The server runs on port 4242, and has endpoints:
POST /records - with the body being a string in one of the three formats from step 1.
GET /records/color - returns records sorted by favorite color
GET /records/birthdate - returns records sorted by birthdate
GET /records/name - returns records sorted by last name
clj -X:test