start build args implementation

ts/mod_docker/mod.classes.dockerfile.ts

@@ -40,7 +40,8 @@ export class Dockerfile {
    */
   async build () {
     plugins.beautylog.info('now building Dockerfile for ' + this.cleanTag)
-    let buildCommand = `docker build -t ${this.buildTag} -f ${this.filePath} .`
+    let buildArgsString = await helpers.getDockerBuildArgs()
+    let buildCommand = `docker build -t ${this.buildTag} -f ${this.filePath} ${buildArgsString} .`
     await bash(buildCommand)
     return
   }

ts/mod_docker/mod.helpers.ts

@@ -153,6 +153,15 @@ export let getDockerTagString = (registryArg: string, repoArg: string, versionAr
   return tagString
 }
 
+export let getDockerBuildArgs = async (): Promise<string> => {
+  plugins.beautylog.info('checking for env vars to be supplied to the docker build')
+  let buildArgsString: string = ''
+  for (let key in NpmciConfig.configObject.dockerEnvBuildargMap) {
+    // TODO
+  }
+  return buildArgsString
+} 
+
 /**
  * 
  */