Rebuild failure - skipping "after_assets_precompile" section of app.yml

Product Support Self-hosting
8

this should not be a top-level key, this should be under hooks, e.g.:

hooks:
  after_assets_precompile:
    - exec:
        cd: $home
        cmd:
          - sudo -E -u discourse bundle exec rake s3:upload_assets
          - sudo -E -u discourse bundle exec rake s3:expire_missing_assets