[Proposal] Be able to install necessary plugins at the installation step.

[guzzilar]

It would be really nice if we somehow can install a list of plugins at the installation step (when we execute docker-compose up)

By having a file named plugins.json with a structure

{
  "gutenberg": "4.8.0",
  "omise": "latest"
}

Or would be crazier to go with bubble.json then:

{
  "require-themes": {
    "blah": "1.0.0"
  },
  "require-plugins": {
    "gutenberg": "4.8.0",
    "omise": "latest"
  }
}