Updated Makefile with help command

Makefile

@@ -1,5 +1,6 @@
 #!make
 SHELL := /bin/bash
+
 include .env
 include .version
 export $(shell sed 's/=.*//' .env)
@@ -9,20 +10,25 @@ SIREN_IMAGES = $(shell docker images 'siren' -a -q)
 
 .PHONY: help build test up down exec clean
 
-build:
+help: ## Help command
+	@echo
+	@cat Makefile | grep -E '^[a-zA-Z\/_-]+:.*?## .*$$' | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+	@echo
+
+build: ## Build the docker image
 	docker build -t siren:${SIREN_VERSION} .
 
-test:
+test: ## Run the docker app as a container
 	docker run --env-file .env -it --rm --name siren siren:${SIREN_VERSION}
 
-up:
+up: ## Start the app
 	docker compose up -d
 
-down:
+down: ## Stop the app
 	docker compose down
 
-exec:
+exec: ## Enter running docker container
 	docker exec -it siren bash
 
-clean:
+clean: ## Cleanup docker images
 	docker rmi $(SIREN_IMAGES)