Add S3 configuration and presigned URL logic for file upload and download

app/internal/logic/pinglogic.go

@@ -25,7 +25,7 @@ func NewPingLogic(ctx context.Context, svcCtx *svc.ServiceContext) *PingLogic {
 }
 
 func (l *PingLogic) Ping(req *types.PingReq) (resp *types.PingResp, err error) {
-	// todo: add your logic here and delete this line
-
-	return
+	return &types.PingResp{
+		Ok: true,
+	}, nil
 }