a3872a271f
Adds backend-node.Dockerfile (Node 20-alpine + nodemon) and a single docker-compose.invyone.yml that brings up all three services on invyone-net with restart unless-stopped, intended for the office Ubuntu host. Uses vexplor_dev DB for both backends and exposes 9772 (frontend) / 8083 (spring) / 8082 (node) on the host. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>