feat: remove path alias.

feat: remove Webpack and depend on nodemon.
feat: refactoring expenses.
feat: optimize system users with caching.
feat: architecture tenant optimize.

server/src/interfaces/Tenancy.ts

@@ -0,0 +1,49 @@
+import { Knex } from 'knex';
+
+export interface ITenant {
+  id: number,
+  organizationId: string,
+
+  initializedAt: Date|null,
+  seededAt: Date|null,
+  createdAt: Date|null,
+}
+
+export interface ITenantDBManager {
+  constructor();
+
+  databaseExists(tenant: ITenant): Promise<boolean>;
+  createDatabase(tenant: ITenant): Promise<void>;
+
+  migrate(tenant: ITenant): Promise<void>;
+  seed(tenant: ITenant): Promise<void>;
+
+  setupKnexInstance(tenant: ITenant): Knex;
+  getKnexInstance(tenantId: number): Knex;
+}
+
+export interface ITenantManager {
+  tenantDBManager: ITenantDBManager;
+  tenant: ITenant;
+
+  constructor(): void;
+
+  createTenant(): Promise<ITenant>;
+  createDatabase(tenant: ITenant): Promise<void>;
+  hasDatabase(tenant: ITenant): Promise<boolean>;
+
+  dropTenant(tenant: ITenant): Promise<void>;
+
+  migrateTenant(tenant: ITenant): Promise<void>;
+  seedTenant(tenant: ITenant): Promise<void>;
+
+  setupKnexInstance(tenant: ITenant): Knex;
+  getKnexInstance(tenantId: number): Knex;
+}
+
+export interface ISystemService {
+  cache();
+  repositories();
+  knex();
+  dbManager();
+}