Add user contributions to docs

[ross-spencer]

E.g. https://github.com/A4EVR/A4EVR-Pool/tree/main/orcfax/monitoring

[ross-spencer]

https://github.com/sannavagon/orcfax-node-monitoring/tree/main

[ross-spencer]

ADACaptial setup script automation: https://github.com/adacapital/orcfax