Fix: Rename directory to remove & character causing shell issues

Renamed ebook_backend&admin_panel to ebook_backend_admin_panel
  The & character was being interpreted by shell as background
  process operator, causing 'Dockerfile not found' errors in Coolify.

ebook_backend_admin_panel/.env.example

@@ -0,0 +1,86 @@
+# =============================================================================
+# EBOOK COUPON MANAGEMENT SYSTEM - ENVIRONMENT CONFIGURATION
+# =============================================================================
+# Copy this file to .env and update with your actual values
+# IMPORTANT: Never commit .env file to version control!
+# =============================================================================
+
+# -----------------------------------------------------------------------------
+# Database Configuration
+# -----------------------------------------------------------------------------
+# PostgreSQL connection string
+DATABASE_URL=postgresql://username:password@host:port/database_name
+
+# Test database (for running tests)
+TEST_DATABASE_URL=postgresql://postgres:postgres@localhost:5432/test_ebook_db
+
+# -----------------------------------------------------------------------------
+# Security Configuration
+# -----------------------------------------------------------------------------
+# SECRET_KEY: Used for JWT tokens and session encryption
+# IMPORTANT: Generate a strong random key for production!
+# Generate with: python -c "import secrets; print(secrets.token_urlsafe(32))"
+SECRET_KEY=your-super-secret-key-change-this-in-production
+
+# Debug mode (NEVER set to true in production!)
+DEBUG=false
+
+# Environment: development, staging, production
+ENVIRONMENT=development
+
+# -----------------------------------------------------------------------------
+# Admin Credentials (AUTO-CREATED ON FIRST RUN)
+# -----------------------------------------------------------------------------
+# These credentials will be used to create the default admin user
+# on first startup if no admin exists in the database.
+#
+# SECURITY WARNING:
+# - Change these immediately after first login in production!
+# - Use strong passwords (12+ characters, mixed case, numbers, symbols)
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=admin123
+
+# -----------------------------------------------------------------------------
+# CORS Configuration
+# -----------------------------------------------------------------------------
+# Allowed origins for Cross-Origin Resource Sharing
+# Comma-separated list
+CORS_ORIGINS=http://localhost:3000,http://localhost:8000,http://127.0.0.1:8000
+
+# Trusted Hosts
+TRUSTED_HOSTS=*
+
+# -----------------------------------------------------------------------------
+# Application Configuration
+# -----------------------------------------------------------------------------
+APP_NAME=Ebook Coupon Management System
+APP_VERSION=1.0.0
+
+# -----------------------------------------------------------------------------
+# Logging Configuration
+# -----------------------------------------------------------------------------
+# Log level: DEBUG, INFO, WARNING, ERROR, CRITICAL
+LOG_LEVEL=INFO
+
+# Log file paths (relative to admin-backend directory)
+LOG_FILE=logs/app.log
+ERROR_LOG_FILE=logs/error.log
+
+# -----------------------------------------------------------------------------
+# File Upload Configuration
+# -----------------------------------------------------------------------------
+# Maximum file size in bytes (default: 10MB)
+MAX_FILE_SIZE=10485760
+
+# Allowed file types for upload
+ALLOWED_FILE_TYPES=.xlsx,.xls
+
+# -----------------------------------------------------------------------------
+# Server Configuration
+# -----------------------------------------------------------------------------
+# Host to bind to (0.0.0.0 for all interfaces)
+HOST=0.0.0.0
+
+# Port to listen on
+PORT=8000
+