feat: add logging to Docker and iptables operations, fix iptables path

- Create /var/log/network-go directory in Dockerfile for log storage
- Add comprehensive logging to Docker client creation, network management, and container operations
- Add logging to iptables rule management (list, delete, etc.)
- Fix iptables executable path resolution in deleteMatchingLinesInContainer to use configured binary path

network-go/watcher/watcher.go

@@ -3,9 +3,10 @@ package watcher
 import (
 	"crypto/md5"
 	"fmt"
-	"log"
 	"os"
 	"time"
+
+	"firewall_containers/network-go/logger"
 )
 
 // FileWatcher periodically checks a file for changes using MD5 hash
@@ -42,7 +43,7 @@ func (fw *FileWatcher) Start() {
 	// Compute initial hash
 	hash, err := fw.hashFile()
 	if err != nil {
-		log.Printf("WATCHER: initial hash computation failed for %s: %v", fw.path, err)
+		logger.Warn("WATCHER: initial hash computation failed for %s: %v", fw.path, err)
 	} else {
 		fw.lastHash = hash
 	}
@@ -51,22 +52,22 @@ func (fw *FileWatcher) Start() {
 		ticker := time.NewTicker(fw.period)
 		defer ticker.Stop()
 
-		log.Printf("WATCHER: started watching %s every %s", fw.path, fw.period)
+		logger.Info("WATCHER: started watching %s every %s", fw.path, fw.period)
 
 		for {
 			select {
 			case <-fw.stopCh:
-				log.Printf("WATCHER: stopped watching %s", fw.path)
+				logger.Info("WATCHER: stopped watching %s", fw.path)
 				return
 			case <-ticker.C:
 				hash, err := fw.hashFile()
 				if err != nil {
-					log.Printf("WATCHER: failed to hash %s: %v", fw.path, err)
+					logger.Warn("WATCHER: failed to hash %s: %v", fw.path, err)
 					continue
 				}
 
 				if hash != fw.lastHash {
-					log.Printf("WATCHER: detected change in %s", fw.path)
+					logger.Info("WATCHER: detected change in %s", fw.path)
 					fw.lastHash = hash
 					if fw.onChange != nil {
 						fw.onChange()