Confirm the stack comes up clean after the Loki healthcheck fix, then capture dashboard screenshots

[Gerrrt]

#8 removed the impossible Loki healthcheck that was deadlocking startup, but nothing has confirmed the fix against the real host yet — the PR's "deployed to the lab and confirmed working" box is unchecked.

Steps

• cd ~/HomeLab && git pull && make up
• Confirm all six containers reach a steady state and Loki no longer blocks Grafana and Alloy
• curl -s localhost:3100/ready returns ready
• Confirm all SNMP targets are up in Prometheus and that InstanceDown{job="loki"} is not firing
• Let it collect a few days of real data
• Capture dashboard screenshots → docs/images/README.md documents the capture steps
• Add them to the README

Notes

If containers collide on names left over from the pre-restructure layout:

docker rm -f prometheus grafana loki alloy snmp-exporter

Screenshots are the one thing that can't be produced from CI — the README currently leans on Mermaid diagrams instead of placeholder images, which is fine but undersells the dashboards.

A make up preflight that detects conflicting legacy container names was discussed and not built; worth doing only if the name collision recurs.