Circle provides pre-build Docker images for lein and boot users but does not provide an image with the Clojure CLI tooling (the clj command) provided in the first-party Clojure packages. We are switching from Lein to the new first-party tooling (deps.edn and cognitect-labs/test-runner) for some projects and it would be great to have the clj tool available in a pre-built image so we don't have to install it explicitly each time.