feat(server): change the playground option to GraphiQL. (#13451)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* The GraphQL interactive UI is now available only in development
environments and will not be accessible in production. This change
affects only the availability of the interactive interface; public
exports and API context types remain unchanged. Users in development can
continue to use the tool as before, while production deployments will no
longer expose the interactive UI.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: DarkSky <25152247+darkskygit@users.noreply.github.com>

packages/backend/server/src/base/graphql/index.ts

@@ -8,6 +8,7 @@ import { Global, Module } from '@nestjs/common';
 import { GraphQLModule } from '@nestjs/graphql';
 import type { Request, Response } from 'express';
 
+import { NodeEnv } from '../../env';
 import { Config } from '../config';
 import { mapAnyError } from '../nestjs/exception';
 import { GQLLoggerPlugin } from './logger-plugin';
@@ -30,7 +31,7 @@ export type GraphqlContext = {
             numberScalarMode: 'integer',
           },
           useGlobalPrefix: true,
-          playground: true,
+          graphiql: env.NODE_ENV === NodeEnv.Development,
           sortSchema: true,
           autoSchemaFile: join(
             env.projectRoot,