attempt dep caching

Author: rmdocherty

.github/workflows/build_deploy.yml

@@ -20,12 +20,10 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: "24"
-
-      - name: Install yarn
-        run: npm install --global yarn
+          cache: "yarn" # This handles the caching for you!
 
       - name: Install dependencies
-        run: yarn install
+        run: yarn install --frozen-lockfile
 
       - name: Setup Pages
         uses: actions/configure-pages@v4