Update makefile.md

Add a `make bash` command to use a bash session so that the up and down arrows use previously used commands.

Author: charlesastwood

docs/makefile.md

@@ -70,6 +70,9 @@ logs: ## Show live logs
 sh: ## Connect to the FrankenPHP container
 	@$(PHP_CONT) sh
 
+bash: ## Connect to the FrankenPHP container via bash so up and down arrows go to previous commands
+	@$(PHP_CONT) bash
+
 test: ## Start tests with phpunit, pass the parameter "c=" to add options to phpunit, example: make test c="--group e2e --stop-on-failure"
 	@$(eval c ?=)
 	@$(DOCKER_COMP) exec -e APP_ENV=test php bin/phpunit $(c)