feat: add caching for Gitea Actions to improve build performance

.gitea/workflows/docker-build.yml

@@ -19,6 +19,16 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
+      - name: Cache Gitea Actions
+        uses: actions/cache@v3
+        with:
+          # The path to the directory that should be cached
+          path: /root/.cache/act
+          # A key to identify the cache
+          key: ${{ runner.os }}-gitea-actions-${{ hashFiles(''.workflow) }}
+          # A fallback key to use if the primary key doesn't match
+          restore-keys: |
+            ${{ runner.os }}-gitea-actions-
       - name: Checkout code
         uses: actions/checkout@v4