Better tagging of images

.github/workflows/build-and-publish.yml

@@ -17,6 +17,9 @@ jobs:
 
     # steps to perform in job
     steps:
+      - name: Set current date as env variable
+        run: echo "BUILD_VERSION::v$(date +'%Y%m%d_%H%M')" >> $GITHUB_ENV
+
       - name: Checkout code
         uses: actions/checkout@v2
 
@@ -40,9 +43,11 @@ jobs:
           file: docker/Dockerfile
           # Note: tags has to be all lower-case
           tags: |
+            glenux/teaching-boilerplate:${{ env.BUILD_VERSION }}
             glenux/teaching-boilerplate:latest
           # build on feature branches, push only on main branch
           push: ${{ github.ref == 'refs/heads/master' }}
 
       - name: Image digest
         run: echo ${{ steps.docker_build.outputs.digest }}
+

Makefile

@@ -19,6 +19,7 @@ BUILD_SLIDES_DIR=$(BUILD_DIR)/slides
 BUILD_DOCS_DIR=$(BUILD_DIR)/docs
 BUILD_IMAGES_DIR=images
 
+BUILD_VERSION=v$(shell date "+%Y%m%d-%H%M")
 
 ## Ports
 DOCS_PORT=5100
@@ -222,3 +223,14 @@ fixme:
 	@egrep --color -rni '(fixme)' $(DOCS_DIR) $(SLIDES_DIR)
 
 .PHONY: fixme
+
+docker-build:
+	docker build -t glenux/teaching-boilerplate:$(BUILD_VERSION)
+	docker tag glenux/teaching-boilerplate:$(BUILD_VERSION) glenux/teaching-boilerplate:latest
+
+docker-push:
+	docker push glenux/teaching-boilerplate:latest
+
+docker-pull:
+	docker pull glenux/teaching-boilerplate:latest
+