Fixes Error in Install

[W1ldAustin]

When running php artisan migrate you run into the following error on a fresh database:

SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'installing' (SQL: alter table `servers` add `installing` tinyint(1) not null default '0' after `description`)

  at vendor/laravel/framework/src/Illuminate/Database/Connection.php:759
    755▕         // If an exception occurs when attempting to run a query, we'll format the error
    756▕         // message to include the bindings with SQL, which will make this exception a
    757▕         // lot more helpful to the developer instead of just the database's errors.
    758▕         catch (Exception $e) {
  ➜ 759▕             throw new QueryException(
    760▕                 $query, $this->prepareBindings($bindings), $e
    761▕             );
    762▕         }
    763▕     }

      +9 vendor frames 
  10  database/migrations/2022_08_02_042345_replace_is_installing_column_with_installing_in_servers_table.php:19
      Illuminate\Support\Facades\Facade::__callStatic()

      +25 vendor frames 
  36  artisan:37
      Illuminate\Foundation\Console\Kernel::handle()

Changing from installing back to is_installing, has fixed the issue for me.

[ericwang401]

Migration fixed in commit https://github.com/Performave/convoy/commit/e93a655dae3c49e62021e2573241dc8ee3e4d4b2