Create compelling Grafana demo (or other?) visualizations for data emitted by the extension

[tbrockman]

Create visualizations that demonstrate useful queries to be ran on the data exported by the application, showing why someone might want to instrument all of their webpages automatically.

This might include things like:

• Page load time (by URL / region / user-agent)
• Breakdown of error logs
• Log panel
• Word cloud
• ...(other queries that I'm forgetting that would be useful)

Add the dashboards as configuration to be passed in the existing docker-compose demo stack.