Add publish script

Author: xcorail

courses/cpp/uboot/image/publish.sh

@@ -0,0 +1,13 @@
+#! /bin/bash
+
+set -e
+set -x
+
+docker login docker.pkg.github.com -u github-actions -p ${GITHUB_TOKEN}
+
+IMAGE_VERSION=latest
+IMAGE_TAG=docker.pkg.github.com/github/codeql-learninglab-actions/courses-cpp-uboot:${IMAGE_VERSION}
+
+docker build -t $IMAGE_TAG .
+
+docker push $IMAGE_TAG

templates/action/image/publish.sh

@@ -0,0 +1,13 @@
+#! /bin/bash
+
+set -e
+set -x
+
+docker login docker.pkg.github.com -u github-actions -p ${GITHUB_TOKEN}
+
+IMAGE_VERSION=latest
+IMAGE_TAG=docker.pkg.github.com/github/codeql-learninglab-actions/courses-cpp-<course-name>:${IMAGE_VERSION}
+
+docker build -t $IMAGE_TAG .
+
+docker push $IMAGE_TAG