ci: update Hugo action, fix folders

.github/workflows/deploy.yml

@@ -14,12 +14,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Hugo
-        uses: peaceiris/actions-hugo@v2
+        uses: peaceiris/actions-hugo@v3
         with:
           hugo-version: '0.123.0'
           extended: true
       - name: Build
-        run: hugo --minify -d build
+        run: hugo --minify -d ./build
       - name: Push build results to separate branch # purely for debuggability
         if: ${{ github.event_name == 'push' }}
         uses: peaceiris/actions-gh-pages@v3
@@ -28,6 +28,8 @@ jobs:
           publish_dir: ./build
           publish_branch: build
       - name: Serve the site # needed so we can run the link checker
+        env:
+          NPM_CONFIG_PREFIX: "~/.npm-global"
         run: |
           npm install -g http-server
           http-server build -p 8080 &
@@ -36,7 +38,7 @@ jobs:
           wget https://github.com/filiph/linkcheck/releases/download/3.0.0/linkcheck-3.0.0-linux-x64.tar.gz
           tar xfz linkcheck-3.0.0-linux-x64.tar.gz --strip-components=1
       - name: Run linkcheck
-        run: ./linkcheck -e -d --check-anchors --skip-file .github/workflows/linkcheck-skipfile.txt http://localhost:8080
+        run: ./linkcheck -e -d --check-anchors --skip-file .github/workflows/linkcheck-skipfile.txt http://localhost:8080/docs
       - uses: burnett01/rsync-deployments@796cf0d5e4b535745ce49d7429f77cf39e25ef39 # v7.0.1
         if: ${{ github.event_name == 'push' }}
         with: