Add on install on docker with Plone 6

We are trying to make a new Plone 6.0.0a4 env in our local env by docker. We can make a vanilla Plone 6.0.0a4 with volto by docker. But we could not install volto add-ons like the demo site (

We want to install 3 add-ons,

  • @eeacms/volto-object-widget 3.0.3
  • volto-slate 5.3.3
  • @kitconcept/volto-blocks-grid 2.4.1

Please let me know how to set up the add-ons by docker.

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Please take a look at this Repository. It has an example of how to add volto adorns to a Docker image.