Two root causes for seeding not working on production:
1. Origin mismatch: The seeder writes content IDs as
http://localhost:7777/content/... but the app was using
window.location.origin (the user's actual browser URL) to
query the relay. Introduced VITE_CONTENT_ORIGIN env var
baked into the Docker build so both sides use the same origin.
2. Dockerfile.seed fragility: Replaced --omit=dev + global tsx
with a cleaner approach that strips sharp from package.json
(the only native dep that fails on Alpine) then does a full
npm install, ensuring tsx/esbuild and all applesauce deps
resolve correctly.
Also improved wait-for-relay to accept any HTTP response (some
relays return 4xx for plain GET) and increased max attempts.
Co-authored-by: Cursor <cursoragent@cursor.com>
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