Docker image update: Redis 6 and 25% smaller image size

[pfaffman (Jay Pfaffman)]

@sam

Yeah multisite uses 1 database

Then what is the db_id: 2 in the multisite config refer to?

@sam

  before_bundle_exec:
    - file:
        path: $home/config/multisite.yml
        contents: |
         secondsite:
           adapter: postgresql
           database: b_discourse
           pool: 25
           timeout: 5000
           db_id: 2
           host_names:
             - b.discourse.example.com