Fix: copy full node_modules into runner for prisma/seed support

Cherry-picking individual prisma modules fails due to transitive
deps (effect, @prisma/config, etc). Copy full node_modules instead.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker/docker-entrypoint.sh

@@ -2,7 +2,7 @@
 set -e
 
 echo "==> Running database migrations..."
-node node_modules/prisma/build/index.js migrate deploy
+npx prisma migrate deploy
 
 echo "==> Starting application..."
 exec node server.js