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📁 nextjs-fullstack-app/
├── 📁 app/ (App Router - Next.js 15)
│   ├── 📁 api/ (Server-side API Routes)
│   │   ├── 📁 auth/
│   │   │   └── 📄 route.ts
│   │   └── 📁 users/
│   │       └── 📄 route.ts
│   ├── 📁 dashboard/
│   │   └── 📄 page.tsx
│   ├── 📁 login/
│   │   └── 📄 page.tsx
│   ├── 📁 signup/
│   │   └── 📄 page.tsx
│   ├── 📄 layout.tsx
│   └── 📄 page.tsx
│
├── 📁 components/ (UI Components)
│   ├── 📄 Header.tsx
│   ├── 📄 Footer.tsx
│   └── 📄 Sidebar.tsx
│
├── 📁 lib/ (Utilities & Server Functions)
│   ├── 📄 db.ts (Prisma/PostgreSQL setup)
│   └── 📄 auth.ts
│
├── 📁 prisma/
│   ├── 📄 schema.prisma
│   └── 📄 seed.ts
│
├── 📁 styles/
│   ├── 📄 globals.css
│   └── 📄 theme.css
│
├── 📁 public/
│   └── 📄 favicon.ico
│
├── 📁 types/
│   └── 📄 index.d.ts
│
├── 📄 middleware.ts
├── 📄 next.config.js
├── 📄 tsconfig.json
├── 📄 tailwind.config.ts
├── 📄 .env
├── 📄 .gitignore
└── 📄 package.json

Explanation of Key Directories:

1️⃣ app/: App Router & Pages (Next.js 15)

➡️ api/: Server-side route handlers (e.g., auth, CRUD logic).

➡️ dashboard/, login/, signup/: Route-specific pages.

➡️ layout.tsx: Root layout shared across all pages.

➡️ page.tsx: Main homepage.

2️⃣ components/:

➡️ Reusable UI parts like Header, Footer, and Sidebar.

3️⃣ lib/:

➡️ Utilities like db.ts for Prisma & PostgreSQL, auth.ts for server actions.

4️⃣ prisma/:

➡️ schema.prisma: Data models.

➡️ seed.ts: Sample data for development.

5️⃣ styles/:

➡️ Tailwind CSS setup and global styles.

6️⃣ public/:

➡️ Static files like images, icons, etc.

7️⃣ types/:

➡️ TypeScript type declarations for props and APIs.

Other Essentials:

  • .env: Environment variables.
  • tsconfig.json: TypeScript config.
  • tailwind.config.ts: Tailwind settings.
  • next.config.js: Next.js app settings.

Use this structure to build scalable, production-ready Fullstack apps using Next.js 15, TypeScript, Prisma, and PostgreSQL.

Get the complete guide here:

Build Fullstack Apps with Next.js 15 and TypeScript — The Modern Way

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Follow @e_opore 🔔 for more project structures and development blueprints!