update

vars/backendServicePipeline.groovy

@@ -28,8 +28,9 @@ def call(String repo, String branch) {
     stage("build docs") {
       steps {
         sh """
-            go install github.com/swaggo/swag/cmd/swag@latest
-            swag init --parseDependency --parseDepth 2
+            curl -LJ -o swag.tar.gz https://github.com/swaggo/swag/releases/download/v1.7.4/swag_1.7.4_Linux_x86_64.tar.gz
+            tar -xf swag.tar.gz             
+            ./swag init --parseDependency --parseDepth 2
         """ 
       }
     }