Switch from YAML to JSON configuration and rule files

- Updated config loading in `cmd/app/config.go` to use JSON instead of YAML
- Modified `internal/service/waf.go` to read WAF rules from JSON file
- Removed YAML library imports and replaced with JSON unmarshaling
- Updated file extensions from `.yaml` to `.json` in file reading logic

cmd/app/config.go

 package app
 
 import (
+	"encoding/json"
 	"os"
 
 	"github.com/rs/zerolog/log"
-	"gopkg.in/yaml.v2"
 )
 
 const (
@@ -41,7 +41,7 @@ type RegionConfig struct {
 }
 
 func LoadConfig() *Config {
-	configFile := "config/config.yaml"
+	configFile := "config/config.json"
 	if envFile := os.Getenv("CONFIG_FILE"); envFile != "" {
 		configFile = envFile
 	}
@@ -53,7 +53,11 @@ func LoadConfig() *Config {
 	}
 
 	var config Config
-	if err := yaml.Unmarshal(data, &config); err != nil {
+	// if err := yaml.Unmarshal(data, &config); err != nil {
+	// 	log.Err(err).Msg("Failed to parse config file")
+	// 	return nil
+	// }
+	if err := json.Unmarshal(data, &config); err != nil {
 		log.Err(err).Msg("Failed to parse config file")
 		return nil
 	}

internal/service/waf.go

@@ -17,7 +17,6 @@ import (
 	"gitlab.com/tensorsecurity-rd/waf-console/internal/model"
 	"gitlab.com/tensorsecurity-rd/waf-console/internal/utils"
 	"gitlab.com/tensorsecurity-rd/waf-console/pkg/apis/waf.security.io/v1alpha1"
-	"gopkg.in/yaml.v3"
 	"gorm.io/gorm"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/sets"
@@ -349,12 +348,13 @@ func (s *wafService) GetRule(ctx context.Context, ruleID int) (*WafRule, error)
 
 func (s *wafService) SaveRuleCategoryToDB(ctx context.Context) error {
 	var categories []WafRuleCategory
-	yamlFile, err := os.ReadFile("rules/waf-rules.yaml")
+	jsonFile, err := os.ReadFile("rules/waf-rules.json")
 	if err != nil {
 		return fmt.Errorf("error reading yaml file: %v", err)
 	}
 
-	err = yaml.Unmarshal(yamlFile, &categories)
+	// err = yaml.Unmarshal(yamlFile, &categories)
+	err = json.Unmarshal(jsonFile, &categories)
 	if err != nil {
 		return fmt.Errorf("error unmarshaling yaml: %v", err)
 	}