chore: move controllers and middleware (#8119)

server/src/controllers/app.controller.ts

@@ -0,0 +1,27 @@
+import { Controller, Get, Header } from '@nestjs/common';
+import { ApiExcludeEndpoint } from '@nestjs/swagger';
+import { SystemConfigService } from 'src/domain/system-config/system-config.service';
+import { PublicRoute } from 'src/middleware/auth.guard';
+
+@Controller()
+export class AppController {
+  constructor(private service: SystemConfigService) {}
+
+  @ApiExcludeEndpoint()
+  @Get('.well-known/immich')
+  getImmichWellKnown() {
+    return {
+      api: {
+        endpoint: '/api',
+      },
+    };
+  }
+
+  @ApiExcludeEndpoint()
+  @PublicRoute()
+  @Get('custom.css')
+  @Header('Content-Type', 'text/css')
+  getCustomCss() {
+    return this.service.getCustomCss();
+  }
+}