Skip router configuration if no agent is present - #19

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4, docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1, docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/