diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..c25047b
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Eric Lee
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b8d2a2d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,132 @@
+# Garmin Parser
+
+TypeScript client and REST API for fetching health and fitness data from [Garmin Connect](https://connect.garmin.com/).
+
+## Features
+
+- **CLI mode** — Fetch today's data interactively or export a date range to JSON
+- **REST API mode** — Serve Garmin data over HTTP with Express
+- **Docker support** — Multi-arch container image with GitHub Actions CI/CD
+- **Session persistence** — OAuth tokens are saved and reused across restarts
+- Daily steps, calories (total / active / BMR), heart rate, sleep, weight, and hydration
+- Recent activities with per-activity calorie breakdown
+
+## Prerequisites
+
+- Node.js >= 20
+- A [Garmin Connect](https://connect.garmin.com/) account
+
+## Quick Start
+
+### 1. Install dependencies
+
+```bash
+npm install
+```
+
+### 2. Configure credentials
+
+```bash
+cp .env.example .env
+```
+
+Edit `.env` and fill in your Garmin Connect credentials:
+
+```
+GARMIN_USERNAME=your.email@example.com
+GARMIN_PASSWORD=your_password_here
+```
+
+### 3. Run in CLI mode
+
+```bash
+# Show today's data
+npm start
+
+# Export last 7 days to JSON
+npm start -- --days 7
+
+# Export last 28 days to JSON
+npm start -- --days 28
+```
+
+Output files are saved to `./output/`.
+
+### 4. Run as REST API server
+
+```bash
+# Build and start
+npm run build
+npm run serve
+
+# Or run in dev mode
+npm run dev:server
+```
+
+The server starts on port `3000` by default (configurable via `PORT` env var).
+
+## API Endpoints
+
+| Method | Path | Description |
+|--------|------|-------------|
+| `GET` | `/health` | Liveness probe |
+| `GET` | `/ready` | Readiness probe (checks Garmin client status) |
+| `GET` | `/api/profile` | User profile |
+| `GET` | `/api/daily?date=YYYY-MM-DD` | Daily data for a specific date (defaults to today) |
+| `GET` | `/api/range?days=7` | Aggregated data for a date range (1–28 days) |
+| `GET` | `/api/activities?limit=10` | Recent activities (1–50) |
+
+### Example response — `/api/daily`
+
+```json
+{
+  "success": true,
+  "data": {
+    "date": "2025-12-25",
+    "steps": 8432,
+    "calories": { "total": 2150, "active": 650, "bmr": 1500 },
+    "heartRate": { "restingHeartRate": 58, "maxHeartRate": 142, "minHeartRate": 52 },
+    "sleep": { "durationSeconds": 28800, "deepSleepSeconds": 7200, "lightSleepSeconds": 14400, "remSleepSeconds": 5400, "awakeSleepSeconds": 1800 },
+    "weight": 68.2,
+    "hydration": 2000
+  }
+}
+```
+
+## Docker
+
+### Pull from GitHub Container Registry
+
+```bash
+docker pull ghcr.io/happyeric77/garmin-parser:latest
+```
+
+### Run
+
+```bash
+docker run -d \
+  -p 3000:3000 \
+  -e GARMIN_USERNAME=your.email@example.com \
+  -e GARMIN_PASSWORD=your_password \
+  -v garmin-tokens:/app/tokens \
+  ghcr.io/happyeric77/garmin-parser:latest
+```
+
+### Build locally
+
+```bash
+docker build -t garmin-parser .
+```
+
+## Project Structure
+
+```
+src/
+  garmin-client.ts   # Garmin Connect client wrapper
+  server.ts          # Express REST API server
+  index.ts           # CLI entry point
+```
+
+## License
+
+[MIT](LICENSE)
diff --git a/package.json b/package.json
index eb998e9..bbdb537 100644
--- a/package.json
+++ b/package.json
@@ -16,9 +16,9 @@
     "health",
     "api"
   ],
-  "author": "",
-  "license": "ISC",
-  "description": "POC for fetching Garmin Connect data using TypeScript",
+  "author": "Eric Lee",
+  "license": "MIT",
+  "description": "TypeScript client and REST API for fetching health and fitness data from Garmin Connect",
   "dependencies": {
     "cli-progress": "^3.12.0",
     "dotenv": "^17.2.3",
diff --git a/src/garmin-client.ts b/src/garmin-client.ts
index 5aea149..587be83 100644
--- a/src/garmin-client.ts
+++ b/src/garmin-client.ts
@@ -53,9 +53,9 @@ export interface GarminWeightData {
 }
 
 export interface CaloriesData {
-  total: number | null;           // 總消耗卡路里 (BMR + 活動)
-  active: number | null;          // 活動消耗卡路里
-  bmr: number | null;             // 基礎代謝卡路里 (Basal Metabolic Rate)
+  total: number | null;           // Total calories burned (BMR + active)
+  active: number | null;          // Active calories burned
+  bmr: number | null;             // Basal Metabolic Rate calories
 }
 
 export interface DailyData {
diff --git a/src/test-calories-api.ts b/src/test-calories-api.ts
deleted file mode 100644
index ef53636..0000000
--- a/src/test-calories-api.ts
+++ /dev/null
@@ -1,282 +0,0 @@
-import * as dotenv from 'dotenv';
-import { GarminConnect } from 'garmin-connect';
-import * as path from 'path';
-import * as fs from 'fs';
-
-// Load environment variables
-dotenv.config();
-
-// Extended GarminConnect type to include methods not in type definitions
-interface ExtendedGarminConnect extends GarminConnect {
-  exportTokenToFile(path: string): void;
-  loadTokenByFile(path: string): void;
-  get<T>(url: string, data?: any): Promise<T>;
-}
-
-const colors = {
-  reset: '\x1b[0m',
-  bright: '\x1b[1m',
-  green: '\x1b[32m',
-  yellow: '\x1b[33m',
-  blue: '\x1b[34m',
-  cyan: '\x1b[36m',
-  red: '\x1b[31m',
-};
-
-function log(color: string, label: string, message: string): void {
-  console.log(`${color}[${label}]${colors.reset} ${message}`);
-}
-
-function formatDate(date: Date): string {
-  return date.toISOString().split('T')[0];
-}
-
-async function testEndpoint(
-  client: ExtendedGarminConnect,
-  name: string,
-  url: string,
-  params?: any
-): Promise<any> {
-  console.log(`\n${colors.bright}${colors.blue}${'='.repeat(60)}${colors.reset}`);
-  console.log(`${colors.bright}Testing: ${name}${colors.reset}`);
-  console.log(`${colors.cyan}URL: ${url}${colors.reset}`);
-  if (params) {
-    console.log(`${colors.cyan}Params: ${JSON.stringify(params)}${colors.reset}`);
-  }
-  console.log(`${colors.blue}${'='.repeat(60)}${colors.reset}`);
-
-  try {
-    const result = await client.get(url, params ? { params } : undefined);
-    log(colors.green, 'SUCCESS', 'API returned data');
-    
-    // Pretty print the result (limited)
-    const resultStr = JSON.stringify(result, null, 2);
-    if (resultStr.length > 2000) {
-      console.log(resultStr.substring(0, 2000) + '\n... (truncated)');
-    } else {
-      console.log(resultStr);
-    }
-    
-    return result;
-  } catch (error: any) {
-    log(colors.red, 'FAILED', error.message || 'Unknown error');
-    return null;
-  }
-}
-
-async function main() {
-  console.log(`
-${colors.bright}${colors.green}
-╔════════════════════════════════════════════════════════════╗
-║         Garmin API Endpoint Tester - Calories              ║
-╚════════════════════════════════════════════════════════════╝
-${colors.reset}`);
-
-  // Validate environment variables
-  const username = process.env.GARMIN_USERNAME;
-  const password = process.env.GARMIN_PASSWORD;
-
-  if (!username || !password) {
-    console.error(`${colors.red}Error: Missing Garmin credentials in .env${colors.reset}`);
-    process.exit(1);
-  }
-
-  // Create client
-  const client = new GarminConnect({
-    username,
-    password,
-  }) as ExtendedGarminConnect;
-
-  const tokenPath = path.join(process.cwd(), 'tokens');
-
-  // Try to load existing tokens
-  try {
-    if (fs.existsSync(path.join(tokenPath, 'oauth1_token.json'))) {
-      log(colors.yellow, 'AUTH', 'Loading stored tokens...');
-      client.loadTokenByFile(tokenPath);
-      // Test if session is valid
-      await client.getUserProfile();
-      log(colors.green, 'AUTH', 'Session restored successfully!');
-    } else {
-      throw new Error('No tokens found');
-    }
-  } catch {
-    log(colors.yellow, 'AUTH', 'Logging in fresh...');
-    await client.login();
-    client.exportTokenToFile(tokenPath);
-    log(colors.green, 'AUTH', 'Login successful!');
-  }
-
-  // Test date - use yesterday to ensure data exists
-  const today = new Date();
-  const yesterday = new Date(today);
-  yesterday.setDate(yesterday.getDate() - 1);
-  
-  const dateStr = formatDate(yesterday);
-  log(colors.cyan, 'INFO', `Testing with date: ${dateStr}`);
-
-  // Base API URL
-  const API_BASE = 'https://connectapi.garmin.com';
-
-  // Get user display name for some endpoints
-  const profile = await client.getUserProfile() as any;
-  const displayName = profile.displayName || profile.userName;
-  log(colors.cyan, 'INFO', `User display name: ${displayName}`);
-
-  // ============================================================
-  // Test various endpoints that might contain calorie data
-  // ============================================================
-
-  const results: { [key: string]: any } = {};
-
-  // 1. User Summary Daily - This is the most likely endpoint
-  results['usersummary-daily'] = await testEndpoint(
-    client,
-    'User Summary Daily',
-    `${API_BASE}/usersummary-service/usersummary/daily/${dateStr}`
-  );
-
-  // 2. User Summary Daily with displayName
-  results['usersummary-daily-displayname'] = await testEndpoint(
-    client,
-    'User Summary Daily (with displayName)',
-    `${API_BASE}/usersummary-service/usersummary/daily/${displayName}`,
-    { calendarDate: dateStr }
-  );
-
-  // 3. Wellness Daily Summary Chart
-  results['wellness-dailysummary'] = await testEndpoint(
-    client,
-    'Wellness Daily Summary Chart',
-    `${API_BASE}/wellness-service/wellness/dailySummaryChart/${displayName}`,
-    { date: dateStr }
-  );
-
-  // 4. Wellness Daily Summary (alternative)
-  results['wellness-dailysummary-alt'] = await testEndpoint(
-    client,
-    'Wellness Daily Summary (alt)',
-    `${API_BASE}/wellness-service/wellness/dailySummaryChart`,
-    { date: dateStr }
-  );
-
-  // 5. Fitness Stats - Calories
-  results['fitnessstats-calories'] = await testEndpoint(
-    client,
-    'Fitness Stats - Calories',
-    `${API_BASE}/fitnessstats-service/activity`,
-    {
-      aggregation: 'daily',
-      startDate: dateStr,
-      endDate: dateStr,
-      metric: 'calories'
-    }
-  );
-
-  // 6. User Summary - All Stats
-  results['usersummary-stats'] = await testEndpoint(
-    client,
-    'User Summary Stats',
-    `${API_BASE}/usersummary-service/stats/${dateStr}/${dateStr}`
-  );
-
-  // 7. Daily Summary from proxy
-  results['proxy-dailysummary'] = await testEndpoint(
-    client,
-    'Proxy Daily Summary',
-    `https://connect.garmin.com/modern/proxy/usersummary-service/usersummary/daily/${dateStr}`
-  );
-
-  // 8. Wellness epoch
-  results['wellness-epoch'] = await testEndpoint(
-    client,
-    'Wellness Epoch',
-    `${API_BASE}/wellness-service/wellness/epoch/wellness/${dateStr}/${dateStr}`
-  );
-
-  // 9. User Summary Calories Burned
-  results['usersummary-caloriesburned'] = await testEndpoint(
-    client,
-    'User Summary Calories Burned',
-    `${API_BASE}/usersummary-service/stats/calories/daily/${dateStr}/${dateStr}`
-  );
-
-  // ============================================================
-  // Summary
-  // ============================================================
-
-  console.log(`\n${colors.bright}${colors.green}${'='.repeat(60)}${colors.reset}`);
-  console.log(`${colors.bright}${colors.green}SUMMARY - Calorie Fields Found${colors.reset}`);
-  console.log(`${colors.green}${'='.repeat(60)}${colors.reset}\n`);
-
-  const calorieFields = [
-    'totalKilocalories',
-    'activeKilocalories', 
-    'bmrKilocalories',
-    'wellnessKilocalories',
-    'burnedKilocalories',
-    'consumedKilocalories',
-    'remainingKilocalories',
-    'netCalorieGoal',
-    'totalCalories',
-    'calories',
-  ];
-
-  for (const [endpointName, result] of Object.entries(results)) {
-    if (result) {
-      const resultStr = JSON.stringify(result);
-      const foundFields: string[] = [];
-      
-      for (const field of calorieFields) {
-        if (resultStr.includes(field)) {
-          foundFields.push(field);
-        }
-      }
-
-      if (foundFields.length > 0) {
-        console.log(`${colors.green}✓ ${endpointName}${colors.reset}`);
-        console.log(`  Fields: ${foundFields.join(', ')}`);
-        
-        // Try to extract actual values
-        for (const field of foundFields) {
-          const value = extractValue(result, field);
-          if (value !== undefined) {
-            console.log(`  ${field}: ${value}`);
-          }
-        }
-        console.log('');
-      }
-    }
-  }
-
-  // Save all results to file for analysis
-  const outputDir = path.join(process.cwd(), 'output');
-  if (!fs.existsSync(outputDir)) {
-    fs.mkdirSync(outputDir, { recursive: true });
-  }
-  
-  const outputPath = path.join(outputDir, `api-test-results-${formatDate(new Date())}.json`);
-  fs.writeFileSync(outputPath, JSON.stringify(results, null, 2));
-  console.log(`\n${colors.cyan}Full results saved to: ${outputPath}${colors.reset}`);
-}
-
-function extractValue(obj: any, field: string): any {
-  if (obj === null || obj === undefined) return undefined;
-  
-  if (typeof obj === 'object') {
-    if (field in obj) {
-      return obj[field];
-    }
-    
-    for (const key of Object.keys(obj)) {
-      const value = extractValue(obj[key], field);
-      if (value !== undefined) {
-        return value;
-      }
-    }
-  }
-  
-  return undefined;
-}
-
-main().catch(console.error);