start on getting some class logic to Docker

ts/npmci.env.ts

@@ -1,7 +1,7 @@
 import "typings-global";
 import * as plugins from "./npmci.plugins";
-
 import {GitRepo} from "smartstring";
+import {Dockerfile} from "./npmci.build.docker"
 
 export let repo = new GitRepo(process.env.CI_BUILD_REPO);
 export let dockerTestTag:string;
@@ -9,4 +9,5 @@ export let dockerReleaseTag:string;
 
 export let dockerRegistry; // will be set by npmci.prepare
 export let dockerImages;
-export let dockerFiles;
+export let dockerFiles:Dockerfile[];
+