Configure each distributor, set markup, map categories to sections, upload a CSV, and sync. No secrets are written into the static files.
On the portal, set DICKER_FEED_URL / DICKER_API_KEY, SYNNEX_FEED_URL / SYNNEX_API_KEY, LEADER_FEED_URL / LEADER_API_KEY, plus CSV_FEED_URL / CSV_API_KEY and JSON_FEED_URL / JSON_API_KEY for the generic feeds. Missing credentials return needsConfig — the adapters will not guess a host.