add user registration

server/package.json

@@ -10,6 +10,8 @@
     "test": "jest"
   },
   "dependencies": {
+    "bcrypt": "^5.0.1",
+    "class-validator": "^0.13.2",
     "dotenv": "^16.0.1",
     "express": "^4.18.1",
     "pg": "^8.7.3",
@@ -17,6 +19,7 @@
     "typeorm": "^0.3.7"
   },
   "devDependencies": {
+    "@types/bcrypt": "^5.0.0",
     "@types/express": "^4.17.13",
     "@types/jest": "^28.1.4",
     "@types/node": "^18.0.3",