The field was cosmetic — `containerConfig.exposedPorts` only fed Docker's
`Config.ExposedPorts` metadata via `withExposedPorts(...)`. It never
published a host port and Traefik routing uses `appPort` from the label
builder, not this list. Users reading the label "Exposed Ports" reasonably
expected it to expose their port externally; removing it until real
multi-port Traefik routing lands (tracked in #149).
Backend DTOs (`ContainerRequest.exposedPorts`, `ConfigMerger.intList
("exposedPorts")`) are left in place so existing containerConfig JSONB
rows continue to deserialize. New writes from the UI will no longer
include the field.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
