Fix docker-compose.yml typo: DOCS_CONTAINER_ missing PORT suffix

[PeaStew]

Summary

In docker-compose.yml line 190, there is a typo in the expose directive for the docs service:

expose:
  - "\${DOCS_CONTAINER_:-4173}"  # Missing "PORT" — should be DOCS_CONTAINER_PORT

Impact

• The env var DOCS_CONTAINER_ is never set (the intended var is DOCS_CONTAINER_PORT)
• Always evaluates to the default 4173 regardless of configuration
• Inconsistent with the ports directive on line 193 which correctly uses DOCS_CONTAINER_PORT

Affected Files

• docker-compose.yml (line 190)

Fix

Change DOCS_CONTAINER_ to DOCS_CONTAINER_PORT.