fix(lego): capture exit code instead of std-out

roles/lego/files/lego_run.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -euo pipefail
+set -xeuo pipefail
 
 LEGO_BINARY=$(/usr/bin/env which lego)
 
@@ -8,7 +8,10 @@ if [[ -n "${LEGO_HTTP_FALLBACK_PORT:-}" ]]; then
     echo "nc not found (in PATH), exiting"
     exit 1
   fi
-  nc_exit_code=$(nc -z 127.0.0.1 $LEGO_HTTP_PORT);
+  set +e
+  nc -z 127.0.0.1 $LEGO_HTTP_PORT;
+  nc_exit_code=$?;
+  set -e
   if [[ $nc_exit_code -eq 0 ]]; then
       LEGO_HTTP_PORT=$LEGO_HTTP_FALLBACK_PORT
   fi