```ruby
# This file is used by Rack-based servers to start the application.

unless defined?(PhusionPassenger)
  # Unicorn self-process killer
  require 'unicorn/worker_killer'

  # Max memory size (RSS) per worker
  use Unicorn::WorkerKiller::Oom, (200 * (1 << 20)), (250 * (1 << 20))
end

require ::File.expand_path('../config/environment',  __FILE__)

map ENV['RAILS_RELATIVE_URL_ROOT'] || "/" do
  run Gitlab::Application
end
```

Fix 'uninitialized constant Unicorn' error
user
```ruby
# This file is used by Rack-based servers to start the application.

unless defined?(PhusionPassenger)
  require 'unicorn'
  # Unicorn self-process killer
  require 'unicorn/worker_killer'

  # Max memory size (RSS) per worker
  use Unicorn::WorkerKiller::Oom, (200 * (1 << 20)), (250 * (1 << 20))
end

require ::File.expand_path('../config/environment',  __FILE__)

map ENV['RAILS_RELATIVE_URL_ROOT'] || "/" do
  run Gitlab::Application
end
```
assistant