ci: 添加 Gitea Actions 示例工作流

- 新增 ci.yaml 文件，定义 Gitea Actions 示例

.drone.yml

@@ -3,12 +3,34 @@ type: docker
 name: default
 
 steps:
+  - name: restore cache
+    image: drillster/drone-cache
+    settings:
+      restore: true
+      mount:
+        - go/pkg/mod
+        - ~/.cache/go-build
+      backend: local
+      cache_key: go-mod-cache-{{ checksum "go.sum" }}
+
   - name: build
     image: golang:1.22
     commands:
+      - go env -w GO111MODULE=on
+      - go env -w GOPROXY=https://goproxy.cn,direct
       - go mod tidy
       - go build -o main.exe .
 
+  - name: rebuild cache
+    image: drillster/drone-cache
+    settings:
+      rebuild: true
+      mount:
+        - go/pkg/mod
+        - ~/.cache/go-build
+      backend: local
+      cache_key: go-mod-cache-{{ checksum "go.sum" }}
+
   - name: upload
     image: appleboy/scp
     settings: