修复 LXC 内 microVM Runner 启动链路

scripts/gitea-microvm-guest-runner

@@ -6,6 +6,7 @@ instance=${2:?Gitea instance is required}
 runner_name=${3:?runner name is required}
 runner_labels=${4:?runner labels are required}
 token_file=/run/gitea-runner-registration-token
+config_file=${GITEA_RUNNER_CONFIG_FILE:-/etc/gitea-runner/config-vm-bootstrap.yaml}
 
 cleanup() {
     rm -f -- "$token_file"
@@ -25,4 +26,4 @@ gitea-runner register \
     --labels "$runner_labels" \
     --token-file "$token_file"
 rm -f -- "$token_file"
-gitea-runner daemon
+gitea-runner daemon --config "$config_file" --once