Describe the bug
When using the recommended webpack config, mikro-orm is excluded from the webpack output because it's configured as an external.

Stack trace
Not needed.

To Reproduce

1. Bundle a Mikro app with this webpack config:
   https://mikro-orm.io/docs/deployment#webpack-configuration

Expected behavior
mikro-orm should be available.

Question
What was the intent in marking Mikro as an external? I had this previously working with the old version of the docs, so what was the motivation behind this change?