Cover the cookie attributes from Opts, and assert the avatar path instead of byte counts - #317

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: wbari/start-mongoDB@v0.2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/