Add a multi-stage Dockerfile to build the React app (node:24-alpine, npm ci, npm run build) and serve the compiled /app/dist via nginx:alpine. Include nginx.conf that routes unknown paths to /index.html so React Router works in a SPA. Add a CI workflow (.forgejo/workflows/docker-publish.yml) to build and push the Docker image to Codeberg Container Registry on pushes to main (requires CODEBERG_TOKEN repository secret and tags the image as codeberg.org/${{ github.repository }}:latest).
