Demo Makefile: 'Make help' with awk. Targets source .env and pass vars to docker compose. Vars are escaped with '$$'. Instructions: save and run 'make help'.

Makefile

.PHONY: help
help:
# Keep this comment line, it is imortant so awk ignores the help target.
	@echo "Available targets:"
	@echo "  help\t\t       Show this help message"
	@awk '/^[^.][a-zA-Z0-9_-]+:/{t=$$1;getline;if($$0~"@echo"){gsub(/^[^"]*"|".*$$/,"",$$0);printf "  %-20s %s\n",substr(t,1,length(t)-1),$$0}}' $(MAKEFILE_LIST)

.PHONY: it
it:
	@echo "Start bash in the container as user 1000"
	. ./.env && docker compose -f docker-compose-$$DOCKER_STACK.yml exec -u1000 -it $$DOCKER_SERVICE /bin/bash

.PHONY: it0
it0:
	@echo "Start bash in the container as root"
	. ./.env && docker compose -f docker-compose-$$DOCKER_STACK.yml exec -u0 -it $$DOCKER_SERVICE /bin/bash