[Agent][GO] - fix docker deploy version

agent-go/a_executor/BaseFunction.go

@@ -866,7 +866,7 @@ func (op *AgentOsOperator) installDockerExec(args []string) (bool, []string) {
 
 		// get by method
 		ok, log4 := HardCodeCommandExecutor("apt-cache madison docker-ce | grep 20.10.20 | awk '{print$3}'")
-		if ok {
+		if ok && log4 != nil && len(log4) > 0 {
 			specificDockerVersion = strings.TrimSpace(log4[0])
 		}
 

agent-go/a_executor/FunctionalExecutor_test.go

@@ -183,7 +183,7 @@ func TestHardCodeCommandExecutor(t *testing.T) {
 
 	// get by method
 	ok, log4 := HardCodeCommandExecutor("apt-cache madison docker-ce | grep 20.10.20 | awk '{print$3}'")
-	if ok {
+	if ok && log4 != nil && len(log4) > 0 {
 		specificDockerVersion = strings.TrimSpace(log4[0])
 	}