Fix compilation bug in environment.dev.ts used by Docker. Add comments

docker/environment.dev.ts

@@ -1,13 +1,13 @@
-/*
+/**
  * The contents of this file are subject to the license and copyright
  * detailed in the LICENSE and NOTICE files at the root of the source
  * tree and available online at
  *
  * http://www.dspace.org/license/
  */
-import { GlobalConfig } from '../src/config/global-config.interface';
-
-export const environment: Partial<GlobalConfig> = {
+// This file is based on environment.template.ts provided by Angular UI
+export const environment = {
+  // Default to using the local REST API (running in Docker)
   rest: {
     ssl: false,
     host: 'localhost',