Add support for specifying the target generator config file

src/context.js

@@ -6,6 +6,7 @@ function getRequiredVars() {
     repositoryNwo: process.env.GITHUB_REPOSITORY,
     githubToken: core.getInput('token'),
     staticSiteGenerator: core.getInput('static_site_generator'),
+    generatorConfigFile: core.getInput('generator_config_file'),
     enablement: core.getInput('enablement') !== 'false'
   }
 }