Easiest way to test is to get an account at neon.tech and create a postgresql db. Use the sql editor in their web front end to run the queries in `chronik-charts/src/database/schema.sql`
Then you can
```
cd apps/chronik-charts
cp env.example .env
```
Edit your .env file with your db query string and select an appropriately recent height so indexing is fast, say 900000
Then
`npm run dev`
In a separate terminal, run the front end
```
cd web/charts.e.cash
npm ci
npm run dev
```
When the back end has finished indexing, the front end will show charts
What I see indexing from 900000:
{F16893779}
{F16893781}