#395 - require is not defined

Add support for @angular-builders/custom-webpack
Setup environment target based on env params
Remove direct code changeing scripts postinstall/postinstall-web

src/environments/environment.web.ts

@@ -0,0 +1,9 @@
+// The file contents for the current environment will overwrite these during build.
+// The build system defaults to the dev environment which uses `index.ts`, but if you do
+// `ng build --env=prod` then `index.prod.ts` will be used instead.
+// The list of which env maps to which file can be found in `.angular-cli.json`.
+
+export const AppConfig = {
+  production: false,
+  environment: 'DEV'
+};