ci: Add caching

.gitea/workflows/build.yaml

@@ -11,6 +11,8 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    env:
+      RUNNER_TOOL_CACHE: /toolcache
 
     steps:
       - name: Checkout
@@ -20,12 +22,21 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: "20"
+          cache: 'yarn'
 
       - name: Enable Corepack and Yarn
         run: |
           corepack enable
           corepack prepare yarn@stable --activate
 
+      - name: Cache node_modules
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-node-modules-${{ hashFiles('yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-node-modules-
+
       - name: Install dependencies
         run: yarn install --immutable