Add workflow to build docker image during PRs if Dockerfile changed

Author: acelaya

.github/workflows/ci-docker-image-build.yml

@@ -0,0 +1,10 @@
+name: Test docker image build
+
+on:
+  pull_request:
+    paths:
+      - 'Dockerfile'
+
+jobs:
+  build-docker-image:
+    uses: shlinkio/github-actions/.github/workflows/docker-image-build-ci.yml@main

.github/workflows/ci.yml

@@ -10,5 +10,5 @@ jobs:
   ci:
     uses: shlinkio/github-actions/.github/workflows/web-app-ci.yml@main
     with:
-      node-version: 22.4
+      node-version: 22.x
       with-unit-tests: false