chore: Docker dev setup

Makefile

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+help:
+	@echo "Main targets: up / down / console / shell"
+
+# Docker commands
+down:
+	docker compose down
+
+up:
+	docker compose up
+
+attach:
+	docker compose attach app
+
+up_attach:
+	docker compose up -d && docker compose attach app
+
+cleanup:
+	docker container rm -f activeadmin_quill_editor_app && docker image rm -f activeadmin_quill_editor-app
+
+# Rails specific commands
+console:
+	docker compose exec -e "PAGER=more" app bin/rails console
+
+routes:
+	docker compose exec app bin/rails routes
+
+specs:
+	docker compose exec app bin/rspec --fail-fast
+
+# Other commands
+bundle:
+	docker compose exec app bundle
+
+shell:
+	docker compose exec -e "PAGER=more" app bash
+
+lint:
+	docker compose exec app bin/rubocop