ci(github): add frontend CI workflow for build and cache (#129)

Author: Sma1lboy

.github/workflows/frontend-ci.yml

@@ -0,0 +1,48 @@
+name: Frontend CI
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - 'frontend/**'
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'frontend/**'
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Install and Build Frontend
+    runs-on: ubuntu-latest
+    
+    defaults:
+      run:
+        working-directory: ./frontend
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '18'
+          cache: 'npm'
+          cache-dependency-path: './frontend/package-lock.json'
+      
+      - name: Install dependencies
+        run: npm ci
+      
+      - name: Build frontend
+        run: npm run build
+      
+      - name: Cache build artifacts
+        uses: actions/cache@v3
+        with:
+          path: |
+            ./frontend/.next
+            ./frontend/node_modules
+          key: ${{ runner.os }}-nextjs-${{ hashFiles('**/package-lock.json') }}-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-nextjs-${{ hashFiles('**/package-lock.json') }}-