Add tembo.md setup guide

tembo.md

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+# Project Setup Guide
+
+## Package Manager
+
+**IMPORTANT: This project uses `bun` as the package manager. You MUST use `bun` for all dependency management operations.**
+
+- **DO NOT** use `npm`, `yarn`, or `pnpm`
+- **ALWAYS** use `bun install` to install dependencies
+- **ALWAYS** use `bun add <package>` to add new dependencies
+- **ALWAYS** use `bun remove <package>` to remove dependencies
+
+The lock file is `bun.lock` - never commit changes from other package managers.
+
+## Installing Dependencies
+
+```bash
+bun install
+```
+
+## Environment Setup
+
+1. Copy the example environment file:
+   ```bash
+   cp .env.example .env.local
+   ```
+
+2. Fill in the required environment variables (values can be found in 1password > DevEnvVars > MCP section)
+
+## Development
+
+Start the development server:
+
+```bash
+bun run dev
+```
+
+The server runs on port 3002 by default.
+
+## Build
+
+Build the project for production:
+
+```bash
+bun run build
+```
+
+## Production
+
+Start the production server:
+
+```bash
+bun run start
+```
+
+## Code Quality
+
+### Linting
+
+Run ESLint (via Next.js):
+
+```bash
+bun run lint
+```
+
+### Formatting
+
+This project uses Prettier for code formatting.
+
+Check formatting:
+
+```bash
+bun run format:check
+```
+
+Fix formatting issues:
+
+```bash
+bun run format
+```
+
+Prettier formats the following file types: `*.ts`, `*.js`, `*.json`, `*.md`
+
+## Project Structure
+
+- `src/` - Source code directory
+- `public/` - Static assets
+- `next.config.ts` - Next.js configuration
+- `tsconfig.json` - TypeScript configuration
+
+## Tech Stack
+
+- **Framework**: Next.js 16
+- **Language**: TypeScript
+- **Styling**: Tailwind CSS 4
+- **Authentication**: Clerk
+- **Package Manager**: Bun (required)