util: Update pull request action

Author: vlasebian

.github/workflows/pull_request.yml

@@ -8,53 +8,65 @@ jobs:
     runs-on: ubuntu-24.04-4core
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
+
       - name: Editor config
         uses: snow-actions/[email protected]
         continue-on-error: true
+
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: "~1.23"
+          go-version-file: go.mod
+
       - name: Get Go module cache directory path
         id: go-module-cache-dir-path
-        run: echo "::set-output name=dir::$(go env GOMODCACHE)"
+        run: echo "dir=$(go env GOMODCACHE)" >> $GITHUB_OUTPUT
+
       - name: Initialize Go module cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.go-module-cache-dir-path.outputs.dir }}
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
           restore-keys: |
             ${{ runner.os }}-go-
+
       - name: Download Go dependencies
         run: make go.deps
+
       - name: Set up Node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: "~16"
+          node-version: "~20"
+
       - name: Get Yarn cache directory path
         id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(npx yarn cache dir)"
+        run: echo "dir=$(npx yarn cache dir)" >> $GITHUB_OUTPUT
+
       - name: Initialize Yarn module cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
           key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
           restore-keys: |
             ${{ runner.os }}-yarn-
+
       - name: Download Yarn dependencies
         run: make js.deps
+
       - name: Initialize Hugo binary cache
         id: cache-hugo
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: hugo.linux
           key: ${{ runner.os }}-hugo-${{ hashFiles('**/go.sum') }}
           restore-keys: |
             ${{ runner.os }}-hugo-
+
       - name: Build Hugo binary
         if: steps.cache-hugo.outputs.cache-hit != 'true'
         run: make hugo.linux
+
       - name: Build docs
         run: make build.public
         env:
@@ -68,3 +80,10 @@ jobs:
           HUGO_PARAMS_SEARCH_APIKEY: ${{ secrets.HUGO_PARAMS_SEARCH_APIKEY }}
           HUGO_PARAMS_SEARCH_ENABLED: true
           HUGO_PARAMS_SEARCH_INDEX: thethingsstack
+
+      - name: Validate build output
+        run: |
+          if [ ! -d "public" ]; then
+            echo "Error: Build output directory 'public' not found"
+            exit 1
+          fi