Disabled Proxy by default and added custom proxy option to jeninsfile

CT-Build/Alpine.Jenkinsfile

@@ -8,6 +8,7 @@ pipeline {
         booleanParam description: 'Only build specified variant', name: 'OneRun'
         string defaultValue: 'VariantName', description: 'Variant for OneBuild', name: 'OneRunVariant'
         booleanParam description: 'Disable of Proxy server for package repos ', name: 'DisProxy'
+        string defaultValue: '192.168.200.11', description: 'Proxy server for packages, (when enabled) ', name: 'ProxyServer'
     }
     options {
         skipDefaultCheckout()
@@ -31,6 +32,9 @@ pipeline {
                 script{                       
                     if (env.DisProxy == 'true') {
                         sh '''bash Scripts/UpdateIMGBuildFile-CacheAndRepo.sh -d'''
+                    } else {
+                        env.ProxyServer = ProxyServer
+                        sh '''bash Scripts/UpdateIMGBuildFile-CacheAndRepo.sh -e $ProxyServer'''
                     }
                 } 
             }