Bookstack SQL error

          _         (),
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         | | / __| | |  /  \ ,
         | | \__ \ | | | () |,
         |_| |___/ |_|  \__/,
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GID/UID,
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User uid:    1000,
User gid:    1000,
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[cont-init.d] 10-adduser: exited 0.,
[cont-init.d] 20-config: executing... ,
[cont-init.d] 20-config: exited 0.,
[cont-init.d] 30-keygen: executing... ,
using keys found in /config/keys,
[cont-init.d] 30-keygen: exited 0.,
[cont-init.d] 50-config: executing... ,
App Key found - setting variable for seds,
Running config - db_user set,
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   Illuminate\Database\QueryException  : SQLSTATE[HY000] [2002] Operation timed out (SQL: select * from information_schema.tables where table_schema = bookstackapp and table_name = migrations and table_type = 'BASE TABLE'),
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  at /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:669,
    665|         // If an exception occurs when attempting to run a query, we'll format the error,
    666|         // message to include the bindings with SQL, which will make this exception a,
    667|         // lot more helpful to the developer instead of just the database's errors.,
    668|         catch (Exception $e) {,
  > 669|             throw new QueryException(,
    670|                 $query, $this->prepareBindings($bindings), $e,
    671|             );,
    672|         },
    673|,
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  Exception trace:,
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  1   Doctrine\DBAL\Driver\PDOException::("SQLSTATE[HY000] [2002] Operation timed out"),
      /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:31,
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  2   PDOException::("SQLSTATE[HY000] [2002] Operation timed out"),
      /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:27,
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  Please use the argument -v to see more details.,
[cont-init.d] 50-config: exited 0.,
[cont-init.d] 99-custom-files: executing... ,
[custom-init] no custom files found exiting...,
[cont-init.d] 99-custom-files: exited 0.,
[cont-init.d] done.,
[services.d] starting services,
[services.d] done.,