Refactor client config (#529)

* Refactor client config

* Fix server tests

* Fix lint

server/src/core/client-config/client-config.resolver.spec.ts

@@ -0,0 +1,25 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { ClientConfigResolver } from './client-config.resolver';
+import { EnvironmentService } from 'src/integrations/environment/environment.service';
+
+describe('ClientConfigResolver', () => {
+  let resolver: ClientConfigResolver;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        ClientConfigResolver,
+        {
+          provide: EnvironmentService,
+          useValue: {},
+        },
+      ],
+    }).compile();
+
+    resolver = module.get<ClientConfigResolver>(ClientConfigResolver);
+  });
+
+  it('should be defined', () => {
+    expect(resolver).toBeDefined();
+  });
+});