implement .env

.env.example

@@ -0,0 +1,27 @@
+# ==============================================
+# QRIS PAYMENT CONFIGURATION - ENVIRONMENT VARIABLES
+# ==============================================
+# Copy this file to .env and fill in the values
+# ==============================================
+
+# Midtrans API Configuration
+MIDTRANS_SANDBOX_AUTH=your_midtrans_sandbox_auth_here
+MIDTRANS_PRODUCTION_AUTH=your_midtrans_production_auth_here
+MIDTRANS_CHARGE_URL=https://api.sandbox.midtrans.com/v2/charge
+MIDTRANS_STATUS_BASE_URL=https://api.sandbox.midtrans.com/v2/
+MIDTRANS_SIMULATOR_URL=https://simulator.sandbox.midtrans.com/v2/qris/index
+
+# Backend Configuration
+BACKEND_BASE_URL=your_backend_base_url_here
+WEBHOOK_URL=your_webhook_url_here
+
+# Application Settings
+MAX_REFRESH_ATTEMPTS=5
+DEFAULT_QR_EXPIRATION_MINUTES=1
+
+# ==============================================
+# INSTRUCTIONS:
+# 1. Copy this file to .env in the same directory
+# 2. Fill in the actual values
+# 3. NEVER commit .env to version control!
+# ==============================================