Deprecate API v2 (#7761)

* deprecate api-v2

* remove v2 test helpers

* remove unused string

website/server/libs/setupNconf.js

@@ -0,0 +1,17 @@
+import nconf from 'nconf';
+import { join, resolve } from 'path';
+
+const PATH_TO_CONFIG = join(resolve(__dirname, '../../../config.json'));
+
+module.exports = function setupNconf (file) {
+  let configFile = file || PATH_TO_CONFIG;
+
+  nconf
+    .argv()
+    .env()
+    .file('user', configFile);
+
+  nconf.set('IS_PROD', nconf.get('NODE_ENV') === 'production');
+  nconf.set('IS_DEV', nconf.get('NODE_ENV') === 'development');
+  nconf.set('IS_TEST', nconf.get('NODE_ENV') === 'test');
+};