diff --git a/.env b/.env
new file mode 100644
index 0000000..13440ca
--- /dev/null
+++ b/.env
@@ -0,0 +1,64 @@
+# Database Configuration (MySQL)
+DATABASE_URL=mysql+pymysql://A060:WLeSCi0yhtc7@mysql.theaken.com:33306/db_A060?charset=utf8mb4
+
+# Database Connection Pool (production settings)
+DB_POOL_SIZE=20
+DB_MAX_OVERFLOW=30
+DB_POOL_TIMEOUT=10
+DB_POOL_RECYCLE=1800
+
+# Security
+FERNET_KEY=lcLwCxME5_b-hvfetyya1pNSivGIVtmpehA896wfqog=
+
+# Server Configuration
+HOST=0.0.0.0
+PORT=8000
+DEBUG=True
+LOG_LEVEL=INFO
+
+# CORS Configuration - allowed origins (comma-separated)
+CORS_ORIGINS=http://localhost:3000
+
+# System Administration
+SYSTEM_ADMIN_EMAIL=ymirliu@panjit.com.tw
+
+# AD API
+AD_API_URL=https://pj-auth-api.vercel.app/api/auth/login
+AD_API_TIMEOUT_SECONDS=10
+
+# Session Settings
+SESSION_INACTIVITY_DAYS=3
+TOKEN_REFRESH_THRESHOLD_MINUTES=5
+MAX_REFRESH_ATTEMPTS=3
+
+# Realtime Messaging Settings
+MESSAGE_EDIT_TIME_LIMIT_MINUTES=15
+TYPING_TIMEOUT_SECONDS=3
+
+# File Upload Limits (in MB)
+IMAGE_MAX_SIZE_MB=10
+DOCUMENT_MAX_SIZE_MB=20
+LOG_MAX_SIZE_MB=5
+
+# MinIO Object Storage
+MINIO_ENDPOINT=localhost:9000
+MINIO_ACCESS_KEY=minioadmin
+MINIO_SECRET_KEY=minioadmin
+MINIO_BUCKET=task-reporter-files
+MINIO_SECURE=false
+
+# DIFY AI Service
+DIFY_BASE_URL=https://dify.theaken.com/v1
+DIFY_API_KEY=app-LGoW3m8zwYJ0ikbvjbkLLNoS
+DIFY_TIMEOUT_SECONDS=120
+
+# Report Generation
+REPORT_MAX_MESSAGES=200
+REPORT_STORAGE_PATH=reports
+
+# Development Scripts Port Configuration
+# Used by start-dev.sh, start-prod.sh, and check-env.sh
+BACKEND_PORT=8000
+FRONTEND_PORT=3000
+MINIO_API_PORT=9000
+MINIO_CONSOLE_PORT=9001
diff --git a/.gitignore b/.gitignore
index 89e16c3..6934d6b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,10 +17,6 @@ ENV/
 *.db
 *.db-journal
 
-# Environment
-.env
-.env.local
-.env.docker
 
 # IDE
 .vscode/