Remove banner from frontend config

NestJS adds the headers "Last Modified" and "ETag" to asset serving responses.
Therefore all the information we need for the banner are already given by the
file content or the file meta data.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

src/frontend-config/frontend-config.service.ts

@@ -8,7 +8,6 @@ import { Inject, Injectable } from '@nestjs/common';
 import { ConsoleLoggerService } from '../logger/console-logger.service';
 import {
   AuthProviders,
-  BannerDto,
   BrandingDto,
   CustomAuthNamesDto,
   FrontendConfigDto,
@@ -24,8 +23,6 @@ import externalServicesConfiguration, {
   ExternalServicesConfig,
 } from '../config/external-services.config';
 import { getServerVersionFromPackageJson } from '../utils/serverVersion';
-import { promises as fs, Stats } from 'fs';
-import { join } from 'path';
 
 @Injectable()
 export class FrontendConfigService {
@@ -49,7 +46,6 @@ export class FrontendConfigService {
       allowAnonymous: false,
       allowRegister: this.authConfig.email.enableRegister,
       authProviders: this.getAuthProviders(),
-      banner: await FrontendConfigService.getBanner(),
       branding: this.getBranding(),
       customAuthNames: this.getCustomAuthNames(),
       iframeCommunication: this.getIframeCommunication(),
@@ -138,23 +134,4 @@ export class FrontendConfigService {
         : new URL(this.appConfig.domain),
     };
   }
-
-  private static async getBanner(): Promise<BannerDto> {
-    const path = join(__dirname, '../../banner.md');
-    try {
-      const bannerContent: string = await fs.readFile(path, {
-        encoding: 'utf8',
-      });
-      const fileStats: Stats = await fs.stat(path);
-      return {
-        text: bannerContent,
-        updateTime: fileStats.mtime,
-      };
-    } catch (e) {
-      return {
-        text: '',
-        updateTime: new Date(0),
-      };
-    }
-  }
 }