start build args implementation

dist/npmci.config.d.ts

@@ -2,6 +2,7 @@ import { KeyValueStore } from 'npmextra';
 export interface INpmciOptions {
     npmGlobalTools: string[];
     dockerRegistryRepoMap: any;
+    dockerEnvBuildargMap: any;
 }
 export declare let kvStorage: KeyValueStore;
 export declare let configObject: INpmciOptions;