Add makefile and scripts and updated build script

Makefile

@@ -0,0 +1,9 @@
+DOCKER_IMAGE_NAME = calpine-os-linux
+DOCKER_IMAGE_VERSION = 3.13.3
+DOCKER_IMAGE_SIZE = $(shell docker images --format "{{.Repository}} {{.Size}}" | grep $(DOCKER_IMAGE_NAME) | cut -d\   -f2)
+
+build:
+	$(shell ./src/build.sh)
+	@echo "Size of the image: ${DOCKER_IMAGE_SIZE}"
+
+.PHONY: build