Makefile: Change CI targets

Signed-off-by: Vitaly Chikunov <vt@altlinux.org>

Makefile

@@ -8,13 +8,13 @@ check:
 	shellcheck -s bash bash_completion debuginfo-kernel-install
 
 # Run just the tests.
-docker-build:
+ci:
 	docker build --progress=plain .
 
-# Also, enter into last docker snapshot (to test something).
-docker: docker-build
+# Enter into last docker snapshot (to test something).
+docker-enter:
 	docker run --rm -it `docker images --format '{{.ID}}' | head -1`
 
-test: check docker-build
+test: check ci
 
 .PHONY: check