feat: 实现用户注册功能，包括数据库表结构、gRPC 服务和业务逻辑

backend/services/user-svc/internal/config/config.go

@@ -0,0 +1,52 @@
+package config
+
+import (
+	"github.com/spf13/viper"
+)
+
+type Config struct {
+	Server   ServerConfig
+	Database DatabaseConfig
+}
+
+type ServerConfig struct {
+	Port int
+}
+
+type DatabaseConfig struct {
+	Host     string
+	Port     int
+	User     string
+	Password string
+	DBName   string
+	SSLMode  string
+}
+
+func Load() (*Config, error) {
+	viper.SetConfigName("config")
+	viper.SetConfigType("yaml")
+	viper.AddConfigPath("./config")
+	viper.AddConfigPath("../config")
+	viper.AddConfigPath("../../config")
+
+	viper.SetDefault("server.port", 9000)
+	viper.SetDefault("database.host", "postgres")
+	viper.SetDefault("database.port", 5432)
+	viper.SetDefault("database.user", "admin")
+	viper.SetDefault("database.password", "password")
+	viper.SetDefault("database.dbname", "backend")
+	viper.SetDefault("database.sslmode", "disable")
+
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
+			return nil, err
+		}
+	}
+
+	var config Config
+	if err := viper.Unmarshal(&config); err != nil {
+		return nil, err
+	}
+
+	return &config, nil
+}