Backend Complete: Interface Refactoring & Service Container Enhancements

Repository Interface Optimization:
- Created IBaseRepository.ts and IPaginatedRepository.ts
- Refactored all 7 repository interfaces to extend base interfaces
- Eliminated ~200 lines of redundant code (70% reduction)
- Improved type safety and maintainability

 Dependency Injection Improvements:
- Added EmailService and GameTokenService to DIContainer
- Updated CreateUserCommandHandler constructor for DI
- Updated RequestPasswordResetCommandHandler constructor for DI
- Enhanced testability and service consistency

 Environment Configuration:
- Created comprehensive .env.example with 40+ variables
- Organized into 12 logical sections (Database, Security, Email, etc.)
- Added security guidelines and best practices
- Documented all backend environment requirements

 Documentation:
- Added comprehensive codebase review
- Created refactoring summary report
- Added frontend implementation guide

Impact: Improved code quality, reduced maintenance overhead, enhanced developer experience

SerpentRace_Backend/scripts/copy-assets.js

@@ -0,0 +1,62 @@
+const fs = require('fs');
+const path = require('path');
+
+/**
+ * Copy Assets Script for SerpentRace Backend
+ * Copies non-TypeScript files to the dist directory
+ */
+
+const srcDir = path.join(__dirname, '..', 'src');
+const distDir = path.join(__dirname, '..', 'dist');
+
+// File extensions to copy
+const assetExtensions = ['.json', '.html', '.css', '.png', '.jpg', '.jpeg', '.gif', '.svg', '.ico', '.woff', '.woff2', '.ttf', '.eot'];
+
+// Directories to exclude from copying
+const excludeDirs = ['node_modules', '.git', 'tests', '__tests__'];
+
+function copyAssets(srcPath, distPath) {
+    if (!fs.existsSync(srcPath)) {
+        console.log(`Source directory ${srcPath} does not exist`);
+        return;
+    }
+
+    if (!fs.existsSync(distPath)) {
+        fs.mkdirSync(distPath, { recursive: true });
+    }
+
+    const items = fs.readdirSync(srcPath);
+
+    items.forEach(item => {
+        const srcItemPath = path.join(srcPath, item);
+        const distItemPath = path.join(distPath, item);
+        const stat = fs.statSync(srcItemPath);
+
+        if (stat.isDirectory()) {
+            // Skip excluded directories
+            if (excludeDirs.includes(item)) {
+                return;
+            }
+            
+            // Recursively copy subdirectories
+            copyAssets(srcItemPath, distItemPath);
+        } else {
+            const ext = path.extname(item).toLowerCase();
+            
+            // Copy asset files
+            if (assetExtensions.includes(ext)) {
+                console.log(`Copying asset: ${srcItemPath} -> ${distItemPath}`);
+                fs.copyFileSync(srcItemPath, distItemPath);
+            }
+        }
+    });
+}
+
+try {
+    console.log('Copying assets from src to dist...');
+    copyAssets(srcDir, distDir);
+    console.log('Asset copying completed successfully!');
+} catch (error) {
+    console.error('Error copying assets:', error);
+    process.exit(1);
+}