fix: resolve issue on deployment

doc/tool/lxc_test_en.md

@@ -0,0 +1,42 @@
+# Testing with LXC
+
+To test the relay setup in a local LXC container (tested on Arch Linux host):
+
+### 1. Host Preparation
+Install the necessary packages:
+```bash
+sudo pacman -S lxc arch-install-scripts dnsmasq
+```
+
+### 2. Network Configuration
+If your host system has IPv6 disabled, you must disable it for LXC as well to avoid service failures:
+Edit `/etc/default/lxc-net` and ensure these lines exist:
+```bash
+USE_LXC_BRIDGE="true"
+LXC_IPV6_ENABLE="false"
+LXC_IPV6_NAT="false"
+```
+*Note: If port 53 is occupied (e.g., by dnscrypt-proxy), you may need to configure your DNS service to listen only on `127.0.0.1` so LXC's dnsmasq can bind to the bridge.*
+
+Restart the network:
+```bash
+sudo systemctl enable --now lxc-net.service
+```
+
+### 3. Create and Prepare Container
+Create a Debian 12 (bookworm) container:
+```bash
+sudo lxc-create -n test -t download -- -d debian -r bookworm -a amd64
+sudo lxc-start -n test
+```
+
+Sync your local repository to the container:
+```bash
+sudo rsync -av --exclude=.git ./ /var/lib/lxc/test/rootfs/relay-ir/
+```
+
+### 4. Run Deployment
+Attach to the container and run the deployment locally:
+```bash
+sudo lxc-attach -n test -- bash -c "cd /relay-ir && ./scripts/initenv.sh && ./scripts/cmdeploy run --ssh-host @local --skip-dns-check"
+```