introduce uptime monitor for easytier public nodes (#1250)

easytier-contrib/easytier-uptime/.env.example

@@ -0,0 +1,29 @@
+# Server Configuration
+SERVER_HOST=127.0.0.1
+SERVER_PORT=8080
+
+# Database Configuration
+DATABASE_PATH=uptime.db
+DATABASE_MAX_CONNECTIONS=10
+
+# Health Check Configuration
+HEALTH_CHECK_INTERVAL=30
+HEALTH_CHECK_TIMEOUT=10
+HEALTH_CHECK_RETRIES=3
+
+# Logging Configuration
+RUST_LOG=info
+LOG_LEVEL=info
+
+# CORS Configuration
+CORS_ALLOWED_ORIGINS=http://localhost:3000,http://localhost:8080
+CORS_ALLOWED_METHODS=GET,POST,PUT,DELETE,OPTIONS
+CORS_ALLOWED_HEADERS=content-type,authorization
+
+# Production Configuration
+NODE_ENV=development
+API_BASE_URL=/api
+
+# Security Configuration
+ENABLE_COMPRESSION=true
+ENABLE_CORS=true