re-uploading work

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+# Work Summary: .env Configuration Implementation
+**Date:** 2026-01-12
+**Status:** ✅ Complete
+
+## Overview
+Updated the Attune API to use `.env` file-based configuration with support for JWT settings, making it easier to configure and run the service locally.
+
+## Changes Made
+
+### 1. Updated SecurityConfig in Common Crate
+**File:** `crates/common/src/config.rs`
+
+- Split `jwt_expiration` into two separate fields:
+  - `jwt_access_expiration` - Access token lifetime (default: 3600s / 1 hour)
+  - `jwt_refresh_expiration` - Refresh token lifetime (default: 604800s / 7 days)
+- Added default functions for both expiration settings
+- Updated Default implementation for SecurityConfig
+- Updated test cases to use new field names
+
+### 2. Updated API Main Entry Point
+**File:** `crates/api/src/main.rs`
+
+**Before:**
+- Read JWT settings from individual environment variables (`JWT_SECRET`, `JWT_ACCESS_EXPIRATION`, `JWT_REFRESH_EXPIRATION`)
+- Manual fallback to defaults
+
+**After:**
+- Added `.env` file loading using `dotenvy` (already a dependency)
+- Priority: `.env.local` > `.env` > environment variables
+- Load JWT configuration from `Config.security` struct
+- Use structured configuration instead of individual env vars
+- Added informative logging showing token expiration times
+
+Key changes:
+```rust
+// Load .env file automatically
+if let Ok(_) = dotenvy::from_filename(".env.local") {
+    info!("Loaded configuration from .env.local");
+} else if let Ok(_) = dotenvy::dotenv() {
+    info!("Loaded configuration from .env");
+}
+
+// Use config values instead of env vars
+let jwt_secret = config.security.jwt_secret.clone().unwrap_or_else(|| {
+    tracing::warn!("JWT_SECRET not set in config, using default (INSECURE for production!)");
+    "insecure_default_secret_change_in_production".to_string()
+});
+
+let jwt_config = JwtConfig {
+    secret: jwt_secret,
+    access_token_expiration: config.security.jwt_access_expiration as i64,
+    refresh_token_expiration: config.security.jwt_refresh_expiration as i64,
+};
+```
+
+### 3. Updated .env.example
+**File:** `.env.example`
+
+- Changed `ATTUNE__SECURITY__JWT_EXPIRATION` to `ATTUNE__SECURITY__JWT_ACCESS_EXPIRATION`
+- Added `ATTUNE__SECURITY__JWT_REFRESH_EXPIRATION` with 7-day default
+- Updated comments to clarify access vs refresh tokens
+
+### 4. Created Default .env File
+**File:** `.env` (new)
+
+Created a simple, ready-to-use configuration file with:
+- Database connection to local PostgreSQL
+- JWT secret for development
+- Access token: 1 hour (3600s)
+- Refresh token: 7 days (604800s)
+- Server on 127.0.0.1:8080
+- Pretty log format for development
+- All essential settings for quick start
+
+### 5. Created Quick Start Guide
+**File:** `docs/quick-start.md` (new)
+
+Comprehensive guide including:
+- Step-by-step database setup
+- Configuration instructions
+- How to start the API
+- Testing examples
+- Common customizations
+- Troubleshooting tips
+- Production deployment checklist
+
+## Configuration Format
+
+The API now uses the following environment variable format:
+
+```bash
+# Double underscore for nested config
+ATTUNE__SECURITY__JWT_SECRET=your-secret-here
+ATTUNE__SECURITY__JWT_ACCESS_EXPIRATION=3600
+ATTUNE__SECURITY__JWT_REFRESH_EXPIRATION=604800
+ATTUNE__DATABASE__URL=postgresql://user:pass@host:port/db
+```
+
+## Benefits
+
+1. **Easier Local Development**
+   - No need to export multiple environment variables
+   - Single `.env` file contains all configuration
+   - Copy `.env.example` to `.env` and start coding
+
+2. **Better Organization**
+   - All config in one place
+   - Structured configuration with validation
+   - Type-safe with Rust's type system
+
+3. **Flexible Configuration**
+   - Support for `.env.local` for personal overrides
+   - Environment variables still work (higher priority)
+   - Config files via `ATTUNE_CONFIG` environment variable
+
+4. **Production Ready**
+   - Clear separation of dev/prod settings
+   - JWT secrets properly configurable
+   - Validation ensures required settings are present
+
+## Usage
+
+### For Development
+
+1. **Quick Start:**
+   ```bash
+   cd attune
+   ./scripts/setup-db.sh
+   cargo run --bin attune-api
+   ```
+   That's it! The `.env` file is already configured.
+
+2. **Custom Settings:**
+   ```bash
+   # Create personal overrides
+   cp .env .env.local
+   # Edit .env.local with your settings
+   # .env.local takes priority
+   ```
+
+### For Production
+
+1. **Don't use .env files** - Use