fix: switch to full node_modules in runner to resolve prisma CLI dependencies

Removes standalone build to allow prisma CLI to run migrations at startup.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

entrypoint.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 set -e
 echo "Corriendo migraciones..."
-node /app/node_modules/prisma/build/index.js migrate deploy
+node node_modules/prisma/build/index.js migrate deploy
 echo "Migraciones OK. Iniciando app..."
-exec node server.js
+exec node_modules/.bin/next start