Fix make test command

We should be using the test database, otherwise we'll get all kind of
errors.

Author: dutow

Makefile

@@ -21,8 +21,9 @@ shell: ## Open a shell in the web container
 console: ## Open Rails console in the web container
 	$(COMPOSE) exec web bin/rails console
 
-test: ## Run RSpec in the web container
-	$(COMPOSE) exec web bundle exec rspec
+test: ## Run RSpec in the web container (uses test database)
+	$(COMPOSE) exec -e RAILS_ENV=test -e DATABASE_URL=postgresql://hackorum:hackorum@db:5432/hackorum_test web bin/rails db:prepare
+	$(COMPOSE) exec -e RAILS_ENV=test -e DATABASE_URL=postgresql://hackorum:hackorum@db:5432/hackorum_test web bundle exec rspec
 
 db-migrate: ## Run db:migrate
 	$(COMPOSE) exec web bin/rails db:migrate