Update to latest example-appstore structure with custom apps

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/rego-tunnel/build/.github/workflows/check.yml

@@ -0,0 +1,35 @@
+on: [workflow_call]
+name: "Check"
+permissions: {}
+
+jobs:
+  shellcheck:
+    name: shellcheck
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v6
+      -
+        name: Run ShellCheck
+        uses: ludeeus/action-shellcheck@master
+        env:
+          SHELLCHECK_OPTS: -x --source-path=src -e SC1091 -e SC2001 -e SC2002 -e SC2034 -e SC2064 -e SC2153 -e SC2317 -e SC2028
+      -
+        name: Lint Dockerfile
+        uses: hadolint/hadolint-action@v3.3.0
+        with:
+          dockerfile: Dockerfile
+          ignore: DL3006,DL3008
+          failure-threshold: warning
+      -
+        name: Validate XML
+        uses: action-pack/valid-xml@v1
+        with:
+         path: "assets"
+         file-endings: ".xml"
+      -
+        name: Validate JSON and YML files
+        uses: GrantBirki/json-yaml-validate@v4
+        with:
+          yaml_exclude_regex: ".*\\kubernetes\\.yml$"