issue entity + remove template code

apps/backend/package.json

@@ -17,9 +17,15 @@
   "dependencies": {
     "@nestjs/common": "^9.0.0",
     "@nestjs/core": "^9.0.0",
+    "@nestjs/mapped-types": "*",
     "@nestjs/platform-express": "^9.0.0",
+    "@nestjs/typeorm": "^9.0.1",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.0",
+    "pg": "^8.11.0",
     "reflect-metadata": "^0.1.13",
-    "rxjs": "^7.2.0"
+    "rxjs": "^7.2.0",
+    "typeorm": "^0.3.16"
   },
   "devDependencies": {
     "@nestjs/cli": "^9.0.0",