fix: enable conditional execution for npm install in frontend build w…

…orkflow

.github/workflows/frontend_build_push.yml

@@ -42,7 +42,7 @@ jobs:
             ${{ runner.os }}-npm-
 
       - name: Install Node.js dependencies
-        # if: steps.npm-cache.outputs.cache-hit != 'true'
+        if: steps.npm-cache.outputs.cache-hit != 'true'
         working-directory: ./frontend
         run: npm install