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/nodemon.json

@@ -0,0 +1,11 @@
+{
+  "watch": [
+    "src",
+    ".env"
+  ],
+  "ext": "js,ts,json",
+  "ignore": [
+    "src/**/*.spec.ts"
+  ],
+  "exec": "ts-node  --transpile-only ./src/server.ts"
+}