Server folder structure plan in README

README.md

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+## Folder structure
+
+### Frontend
+
+### Server
+
+```
+src/
+├── index.ts/               entry point
+├── routes/                 route mapping to controllers
+├── middleware/             middlewares that are called before controllers
+├── controllers/            route handling logic
+├── services/               methods that talk to the database
+├── core/                   business logic
+└── prisma/
+    ├── migrations/         migrations
+    ├── schema.prisma       database models
+    └── seed.ts             seeding script
+```