Add makefile to demo pushing to registries

06-building-container-images/client-react/Dockerfile.5

@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1.5
+
 FROM node:19.4-bullseye AS build
 
 # Specify working directory other than /

07-container-registries/Dockerfile

@@ -0,0 +1,2 @@
+# Empty dockerfile to demonstrate pushing to registries
+FROM scratch

07-container-registries/Makefile

@@ -0,0 +1,23 @@
+.PHONY: build
+build:
+	docker build --tag my-scratch-image .
+
+# Have to authenticate to dockerhub and create repo first:
+# https://docs.docker.com/engine/reference/commandline/login/
+.PHONY: push-dockerhub
+push-dockerhub: build
+	docker tag my-scratch-image sidpalas/my-scratch-image # defaults to latest
+	docker push sidpalas/my-scratch-image
+
+	docker tag my-scratch-image sidpalas/my-scratch-image:abc-123 # defaults to latest
+	docker push sidpalas/my-scratch-image:abc-123
+
+# Have to authenticate to ghcr.io first
+# https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#authenticating-to-the-container-registry
+.PHONY: push-github-packages
+push-github-packages: build
+	docker tag my-scratch-image ghcr.io/sidpalas/my-scratch-image # defaults to latest
+	docker push ghcr.io/sidpalas/my-scratch-image
+
+	docker tag my-scratch-image ghcr.io/sidpalas/my-scratch-image:abc-123 # defaults to latest
+	docker push ghcr.io/sidpalas/my-scratch-image:abc-123