Fixed Docker Buildkit deprecation and permission problem.

scripts/manager.sh

@@ -49,7 +49,8 @@ build_docker_image() {
         return 1
     fi
     echo "Building Docker image..."
-    if docker build -t "$IMAGE_NAME" .; then
+    export DOCKER_BUILDKIT=1
+    if sudo docker build -t "$IMAGE_NAME" .; then
         echo "Docker image built successfully."
         return 0
     else
@@ -294,7 +295,7 @@ install() {
     update_config
 
     print_header "Building the Docker Image..."
-    
+
     if ! build_docker_image; then
         print_header "Failed to build Docker image."
         return 1