fix(docker): add binary duniter-cucumber in release mode too

.gitlab-ci.yml

@@ -161,6 +161,14 @@ tests_release:
     - cargo cucumber -i balance*
     - cargo cucumber -i monetary*
     - cargo cucumber -i transfer*
+  after_script:
+    - cd target/debug/deps/
+    - rm cucumber_tests-*.d
+    - mv cucumber_tests* ../../../build/duniter-cucumber
+  artifacts:
+    paths:
+      - build/
+    expire_in: 3 day
   dependencies:
     - build_release