Dokku：应用程序容器无法启动/找不到服务器“”

Question

我目前正在尝试使用 Dokku 执行我的应用程序的首次部署。不幸的是，我有一个错误：

-----> Discovering process types
       Procfile declares types -> web, webpack
-----> Releasing myapp...
-----> Deploying myapp...
-----> Checking for predeploy task
       No predeploy task found, skipping
-----> Checking for release task
       No release task found, skipping
-----> App Procfile file found
-----> DOKKU_SCALE file exists
=====> Processing deployment checks
       No CHECKS file found. Simple container checks will be performed.
       For more efficient zero downtime deployments, create a CHECKS file. See http://dokku.viewdocs.io/dokku/deployment/zero-downtime-deploys/ for examples
-----> Attempting pre-flight checks (web.1)
       Waiting for 10 seconds ...
remote:  !     App container failed to start!!
=====> myapp web container output:
       Could not find server "".
       Run `bin/rails server --help` for more options.

我猜我的 Procfile 有问题，但我真的没有看到：

web: bin/rails server -p ${PORT:-5000} -e $RAILS_ENV
webpack: NODE_ENV=production ./bin/webpack --watch --colors --progress

# dokku ps:scale myapp
-----> Scaling for myapp
proctype: qty
--------: ---
web:  1
webpack: 1

有什么想法吗？非常感谢您的帮助！

Answer 1

好的，这个问题很傻。 puma gem 属于开发组，因此无法在生产环境中启动服务器。