fix: 数据持久化到/app/data目录，简化部署配置

- 配置文件和SQLite数据库存储在/app/data
- Docker volume持久化数据
- 无需预设环境变量，安装向导自动配置

backend/internal/config/config.go

@@ -2,29 +2,40 @@ package config
 
 import (
 	"log"
+	"os"
 
 	"github.com/spf13/viper"
 )
 
-// Init 初始化配置
+var dataDir = "/app/data"
+
 func Init() {
+	if dir := os.Getenv("DATA_DIR"); dir != "" {
+		dataDir = dir
+	}
+	if _, err := os.Stat(dataDir); os.IsNotExist(err) {
+		os.MkdirAll(dataDir, 0755)
+	}
+
 	viper.SetConfigName("config")
 	viper.SetConfigType("yaml")
+	viper.AddConfigPath(dataDir)
 	viper.AddConfigPath(".")
 	viper.AddConfigPath("./config")
 
-	// 设置默认值
 	setDefaults()
 
-	// 读取配置文件
 	if err := viper.ReadInConfig(); err != nil {
 		log.Printf("Warning: Config file not found, using defaults: %v", err)
 	}
 
-	// 环境变量覆盖
 	viper.AutomaticEnv()
 }
 
+func GetDataDir() string {
+	return dataDir
+}
+
 // setDefaults 设置默认配置值
 func setDefaults() {
 	// 应用配置

backend/internal/database/database.go

@@ -11,7 +11,6 @@ import (
 	"context"
 	"fmt"
 	"log"
-	"os"
 	"path/filepath"
 	"time"
 	"verification-platform-backend/internal/config"
@@ -52,26 +51,18 @@ func initDatabase() {
 }
 
 func initSQLite() {
-	dbPath := "verification_platform.db"
-	absPath, err := filepath.Abs(dbPath)
-	if err != nil {
-		log.Fatal("Failed to get absolute path:", err.Error())
-	}
-
-	wd, err := os.Getwd()
-	if err == nil && filepath.Base(wd) == "cmd" {
-		absPath = filepath.Join(filepath.Dir(wd), "verification_platform.db")
-	}
+	dataDir := config.GetDataDir()
+	dbPath := filepath.Join(dataDir, "verification_platform.db")
 
 	var errOpen error
-	DB, errOpen = gorm.Open(sqlite.Open(absPath), &gorm.Config{
+	DB, errOpen = gorm.Open(sqlite.Open(dbPath), &gorm.Config{
 		Logger:                                   logger.Default.LogMode(logger.Silent),
 		DisableForeignKeyConstraintWhenMigrating: true,
 	})
 	if errOpen != nil {
 		log.Fatal("Failed to create SQLite database:", errOpen.Error())
 	}
-	log.Printf("Using SQLite database: %s\n", absPath)
+	log.Printf("Using SQLite database: %s\n", dbPath)
 
 	if sqlDB, err := DB.DB(); err == nil {
 		sqlDB.SetMaxIdleConns(10)
@@ -132,27 +123,19 @@ func initAutoDetect() {
 	})
 
 	if err != nil {
-		log.Println("Failed to connect to MySQL, using SQLite database for development:", err.Error())
+		log.Println("Failed to connect to MySQL, using SQLite database:", err.Error())
 
-		dbPath := "verification_platform.db"
-		absPath, err := filepath.Abs(dbPath)
-		if err != nil {
-			log.Fatal("Failed to get absolute path:", err.Error())
-		}
+		dataDir := config.GetDataDir()
+		dbPath := filepath.Join(dataDir, "verification_platform.db")
 
-		wd, err := os.Getwd()
-		if err == nil && filepath.Base(wd) == "cmd" {
-			absPath = filepath.Join(filepath.Dir(wd), "verification_platform.db")
-		}
-
-		DB, err = gorm.Open(sqlite.Open(absPath), &gorm.Config{
+		DB, err = gorm.Open(sqlite.Open(dbPath), &gorm.Config{
 			Logger:                                   logger.Default.LogMode(logger.Silent),
 			DisableForeignKeyConstraintWhenMigrating: true,
 		})
 		if err != nil {
 			log.Fatal("Failed to create SQLite database:", err.Error())
 		}
-		log.Printf("Database file path: %s\n", absPath)
+		log.Printf("Using SQLite database: %s\n", dbPath)
 	}
 
 	if sqlDB, err := DB.DB(); err == nil {

backend/internal/router/install/install.go

@@ -80,9 +80,9 @@ func handleTestDatabase(c *gin.Context) {
 	}
 
 	if req.DbType == "sqlite" {
-		dbPath := "verification_platform.db"
-		absPath, _ := filepath.Abs(dbPath)
-		testDB, err := gorm.Open(sqlite.Open(absPath), &gorm.Config{
+		dataDir := config.GetDataDir()
+		dbPath := filepath.Join(dataDir, "verification_platform.db")
+		testDB, err := gorm.Open(sqlite.Open(dbPath), &gorm.Config{
 			Logger: logger.Default.LogMode(logger.Silent),
 		})
 		if err != nil {
@@ -167,9 +167,9 @@ func handleSetup(c *gin.Context) {
 	var err error
 
 	if req.DbType == "sqlite" {
-		dbPath := "verification_platform.db"
-		absPath, _ := filepath.Abs(dbPath)
-		newDB, err = gorm.Open(sqlite.Open(absPath), &gorm.Config{
+		dataDir := config.GetDataDir()
+		dbPath := filepath.Join(dataDir, "verification_platform.db")
+		newDB, err = gorm.Open(sqlite.Open(dbPath), &gorm.Config{
 			Logger:                                   logger.Default.LogMode(logger.Silent),
 			DisableForeignKeyConstraintWhenMigrating: true,
 		})
@@ -241,6 +241,11 @@ func handleSetup(c *gin.Context) {
 }
 
 func checkConfigFile() bool {
+	dataDir := config.GetDataDir()
+	configPath := filepath.Join(dataDir, "config.yaml")
+	if _, err := os.Stat(configPath); err == nil {
+		return true
+	}
 	paths := []string{"config.yaml", "./config/config.yaml"}
 	for _, p := range paths {
 		if _, err := os.Stat(p); err == nil {
@@ -338,7 +343,9 @@ func generateConfigFile(dbType string, req SetupRequest, jwtSecret string) strin
 }
 
 func saveConfigFile(content string) error {
-	file, err := os.Create("config.yaml")
+	dataDir := config.GetDataDir()
+	configPath := filepath.Join(dataDir, "config.yaml")
+	file, err := os.Create(configPath)
 	if err != nil {
 		return err
 	}

docker-compose.prod.yml

@@ -1,4 +1,16 @@
 services:
+  app:
+    image: ghcr.io/cmakecpp/verify:main
+    container_name: verify-app
+    restart: unless-stopped
+    ports:
+      - "${APP_PORT:-8080}:8080"
+    volumes:
+      - app_data:/app/data
+      - uploads:/app/uploads
+    networks:
+      - verify-network
+
   mysql:
     image: mysql:8.0
     container_name: verify-mysql
@@ -8,42 +20,13 @@ services:
       MYSQL_DATABASE: ${MYSQL_DATABASE:-verification_platform}
       MYSQL_CHARACTER_SET_SERVER: utf8mb4
       MYSQL_COLLATION_SERVER: utf8mb4_unicode_ci
-    ports:
-      - "${MYSQL_PORT:-3306}:3306"
     volumes:
       - mysql_data:/var/lib/mysql
     networks:
       - verify-network
-    healthcheck:
-      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
-      interval: 10s
-      timeout: 5s
-      retries: 5
-
-  app:
-    image: ghcr.io/cmakecpp/verify:main
-    container_name: verify-app
-    restart: unless-stopped
-    environment:
-      - APP_ENV=production
-      - APP_PORT=8080
-      - APP_JWT_SECRET=${JWT_SECRET:-your-jwt-secret-change-me}
-      - DATABASE_HOST=mysql
-      - DATABASE_PORT=3306
-      - DATABASE_NAME=${MYSQL_DATABASE:-verification_platform}
-      - DATABASE_USERNAME=root
-      - DATABASE_PASSWORD=${MYSQL_ROOT_PASSWORD:-root123456}
-    ports:
-      - "${APP_PORT:-8080}:8080"
-    volumes:
-      - uploads:/app/uploads
-    depends_on:
-      mysql:
-        condition: service_healthy
-    networks:
-      - verify-network
 
 volumes:
+  app_data:
   mysql_data:
   uploads: