create folders for components;

components/control_center/src/environments/environment.prod.ts

@@ -0,0 +1,9 @@
+import {NgxLoggerLevel} from 'ngx-logger';
+
+export const environment = {
+  production: true,
+  location: window.location.hostname,
+  port: 8000,
+  ws_url_root: 'ws://' + window.location.hostname + ':' + window.location.port + '/',
+  log_level: NgxLoggerLevel.WARN,
+};

components/control_center/src/environments/environment.ts

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+// This file can be replaced during build by using the `fileReplacements` array.
+// `ng build --prod` replaces `environment.ts` with `environment.prod.ts`.
+// The list of file replacements can be found in `angular.json`.
+
+import {NgxLoggerLevel} from 'ngx-logger';
+
+export const environment = {
+  production: false,
+  location: 'localhost',
+  port: 8000,
+  ws_location: 'ws://127.0.0.1',
+  ws_port: 8000,
+  log_level: NgxLoggerLevel.DEBUG,
+};
+
+/*
+ * For easier debugging in development mode, you can import the following file
+ * to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.
+ *
+ * This import should be commented out in production mode because it will have a negative impact
+ * on performance if an error is thrown.
+ */
+// import 'zone.js/dist/zone-error';  // Included with Angular CLI.