ci: cache build output and deps (#19)

Author: stabldev

.github/workflows/ci.yml

@@ -25,5 +25,21 @@ jobs:
           node-version: ${{ matrix.node-version }}
           cache: 'pnpm'
 
+      - name: Cache pnpm store
+        uses: actions/cache@v4
+        with:
+          path: ~/.pnpm-store
+          key: ${{ runner.os }}-pnpm-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-
+
+      - name: Cache Next.js build cache
+        uses: actions/cache@v4
+        with:
+          path: .next/cache
+          key: ${{ runner.os }}-nextjs-${{ hashFiles('**/pnpm-lock.yaml') }}-${{ hashFiles('**/*.js', '**/*.jsx', '**/*.ts', '**/*.tsx') }}
+          restore-keys: |
+            ${{ runner.os }}-nextjs-${{ hashFiles('**/pnpm-lock.yaml') }}-
+
       - run: pnpm install --frozen-lockfile
       - run: pnpm build