catch error and umount vfs

Signed-off-by: greatbridf <greatbridf@icloud.com>

deploy.sh

@@ -97,6 +97,12 @@ $mirror/$alpine_version/community
 EOF
 }
 
+umount_vfs_cleanup() {
+	for fs in proc sys dev; do
+		umount "$chroot_dir/$fs"
+	done
+}
+
 bind_mount_vfs() {
 	for fs in proc sys dev; do
 		mount -o bind "/$fs" "$chroot_dir/$fs"
@@ -111,7 +117,12 @@ install_inside_chroot() {
 	chmod +x "$inside_deploy_path"
 
 	bind_mount_vfs
+	trap umount_vfs_cleanup EXIT
+
 	chroot "$chroot_dir" /deploy.sh setup
+
+	trap - EXIT
+	umount_vfs_cleanup
 }
 
 extra_setup_vim() {