init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

webapp-back/config/config.go

@@ -0,0 +1,108 @@
+package config
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	// Server
+	Port    string
+	GinMode string
+
+	// Database
+	DBType     string
+	DBHost     string
+	DBPort     string
+	DBUser     string
+	DBPassword string
+	DBName     string
+
+	// Redis
+	RedisHost     string
+	RedisPort     string
+	RedisPassword string
+	RedisDB       string
+
+	// Auth
+	AuthCenterURL      string
+	AuthTokenCacheTTL  string
+	AllowedOrigins     string
+
+	// Web3
+	ArbSepoliaRPC string
+	BSCTestnetRPC string
+
+	// Liquidation Bot
+	LiquidatorPrivateKey string
+
+	// Collateral Buyer Bot
+	CollateralBuyerPrivateKey string
+	CollateralBuyerMaxAmount  string
+	CollateralBuyerSlippage   int
+}
+
+var AppConfig *Config
+
+// Load configuration from environment variables
+func Load() *Config {
+	// Load .env file
+	if err := godotenv.Load(); err != nil {
+		log.Println("No .env file found, using environment variables")
+	}
+
+	AppConfig = &Config{
+		Port:    getEnv("PORT", "8080"),
+		GinMode: getEnv("GIN_MODE", "debug"),
+
+		DBType:     getEnv("DB_TYPE", "mysql"),
+		DBHost:     getEnv("DB_HOST", "localhost"),
+		DBPort:     getEnv("DB_PORT", "3306"),
+		DBUser:     getEnv("DB_USER", "root"),
+		DBPassword: getEnv("DB_PASSWORD", ""),
+		DBName:     getEnv("DB_NAME", "assetx"),
+
+		RedisHost:     getEnv("REDIS_HOST", "localhost"),
+		RedisPort:     getEnv("REDIS_PORT", "6379"),
+		RedisPassword: getEnv("REDIS_PASSWORD", ""),
+		RedisDB:       getEnv("REDIS_DB", "0"),
+
+		AuthCenterURL:     getEnv("AUTH_CENTER_URL", "https://auth.upay01.com"),
+		AuthTokenCacheTTL: getEnv("AUTH_TOKEN_CACHE_TTL", "300"),
+		AllowedOrigins:    getEnv("ALLOWED_ORIGINS", "http://localhost:8000"),
+
+		ArbSepoliaRPC: getEnv("ARB_SEPOLIA_RPC", "https://sepolia-rollup.arbitrum.io/rpc"),
+		BSCTestnetRPC: getEnv("BSC_TESTNET_RPC", "https://api.zan.top/node/v1/bsc/testnet/baf84c429d284bb5b676cb8c9ca21c07"),
+
+		LiquidatorPrivateKey: getEnv("LIQUIDATOR_PRIVATE_KEY", ""),
+
+		CollateralBuyerPrivateKey: getEnv("COLLATERAL_BUYER_PRIVATE_KEY", ""),
+		CollateralBuyerMaxAmount:  getEnv("COLLATERAL_BUYER_MAX_AMOUNT", "100"),
+		CollateralBuyerSlippage:   getEnvInt("COLLATERAL_BUYER_SLIPPAGE", 2),
+	}
+
+	return AppConfig
+}
+
+func getEnv(key, defaultValue string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		return defaultValue
+	}
+	return value
+}
+
+func getEnvInt(key string, defaultValue int) int {
+	value := os.Getenv(key)
+	if value == "" {
+		return defaultValue
+	}
+	var i int
+	if _, err := fmt.Sscanf(value, "%d", &i); err != nil {
+		return defaultValue
+	}
+	return i
+}