ci(github): fix VSCode dev container publish job - use official builder

1. We don't have a Dockerfile anymore to define the image of the dev container
instead the build's input is the `devcontainer.json` file which can be built
using the `@devcontainers/cli` npm package instead of the usual `docker build`
command on the terminal.
2. The ci.yaml job building the image was already doing the build this way but
we must've forgotten to update the publish job as well.

Signed-off-by: Peter Somogyvari <[email protected]>

.github/workflows/dev-container-vscode-publish.yaml

@@ -16,6 +16,7 @@ concurrency:
 
 env:
   IMAGE_NAME: cactus-dev-container-vscode
+  NODEJS_VERSION: v18.18.2
 
 jobs:
   # Push image to GitHub Packages.
@@ -31,15 +32,17 @@ jobs:
       contents: read
 
     steps:
+      - name: Use Node.js ${{ env.NODEJS_VERSION }}
+        uses: actions/[email protected]
+        with:
+          node-version: ${{ env.NODEJS_VERSION }}
       - uses: actions/[email protected]
-
-      - name: Build image
-        run: docker build "$DOCKER_BUILD_DIR" --file "$DOCKERFILE_PATH" --tag "$IMAGE_NAME" --label "runnumber=${GITHUB_RUN_ID}"
-
+      - name: npm_install_@devcontainers/[email protected]
+        run: npm install -g @devcontainers/[email protected]
+      - name: npx_yes_devcontainers_cli_build
+        run: npx --yes @devcontainers/[email protected] build --workspace-folder="./" --log-level=trace --push=false --config="./.devcontainer/devcontainer.json" --image-name="$IMAGE_NAME"
       - name: Log in to registry
-        # This is where you will update the PAT to GITHUB_TOKEN
         run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
-
       - name: Push image
         run: |
           SHORTHASH=$(git rev-parse --short "$GITHUB_SHA")