Use laravel db host for wait for it.

Author: PKuebler

home/app/run-prod.sh

@@ -10,7 +10,9 @@ chown www-data:www-data -R /opt/app/storage
 chown www-data:www-data -R /opt/app/bootstrap/cache
 
 # migrate and setup database
-wait-for-it.sh mysql:3306
+if [ -z "$DB_HOST" ]; then
+  wait-for-it.sh $DB_HOST
+fi
 php artisan migrate --force
 php artisan setup