Add Docker-based release tooling for easier releases

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

Makefile

@@ -7,7 +7,7 @@ DESTDIR = rootfs
 IMAGE = sparkos.img
 IMAGE_SIZE = 512M
 
-.PHONY: all clean init image help install
+.PHONY: all clean init image help install docker-release
 
 all: init
 
@@ -15,13 +15,17 @@ help:
 	@echo "SparkOS Build System"
 	@echo "===================="
 	@echo "Targets:"
-	@echo "  make init    - Build the init system"
-	@echo "  make install - Install init to rootfs"
-	@echo "  make image   - Create bootable dd-able image (requires root)"
-	@echo "  make clean   - Clean build artifacts"
+	@echo "  make init           - Build the init system"
+	@echo "  make install        - Install init to rootfs"
+	@echo "  make image          - Create bootable dd-able image (requires root)"
+	@echo "  make docker-release - Build release package using Docker (no root required)"
+	@echo "  make clean          - Clean build artifacts"
 	@echo ""
 	@echo "Note: Creating a bootable image requires root privileges"
 	@echo "      and various tools (debootstrap, syslinux, etc.)"
+	@echo ""
+	@echo "For easier release building, use Docker:"
+	@echo "      ./scripts/docker-release.sh v1.0.0"
 
 init: src/init.c
 	@echo "Building SparkOS init system..."
@@ -42,9 +46,14 @@ image: install
 	fi
 	@./scripts/create_image.sh
 
+docker-release:
+	@echo "Building release package using Docker..."
+	@./scripts/docker-release.sh
+
 clean:
 	@echo "Cleaning build artifacts..."
 	rm -f init
 	rm -f $(IMAGE)
 	rm -rf build/
+	rm -rf release/
 	@echo "Clean complete"