ci: 添加 Gitea Actions 示例工作流

- 新增 ci.yaml 文件，定义 Gitea Actions 示例

.drone.yml

@@ -9,7 +9,7 @@ steps:
       - go env -w GO111MODULE=on
       - go env -w GOPROXY=https://goproxy.cn,direct
       - go mod tidy
-      - GOOS=linux GOARCH=amd64 go build -o main main.go
+      - gf build main.go -n main -a amd64 -s linux
 
   - name: upload
     image: appleboy/drone-scp
@@ -20,7 +20,7 @@ steps:
         from_secret: scp_password
       port: 222
       source:
-        - main
+        - linux_amd64/main
 #        - scripts/start.sh
       target: /opt/dockeropt/epic-go