1. `ninja`
2. `./src/bitcoind -help`: Under `-debug` option, it lists `chronik`
3. `./src/bitcoind -regtest`: Still logs (only) "Starting Chronik..." as before
4. `./src/bitcoind -regtest -debug=chronik`: Now also logs "Note: Chronik is not implemented yet. These logs are just for testing."
5. `./src/bitcoind -regtest -debug=chronik -logsourcelocations`: Logs:
[chronik/chronik-lib/src/bridge.rs:11] [<chronik unknown>] Starting Chronik...
[chronik/chronik-lib/src/bridge.rs:12] [<chronik unknown>] Note: Chronik is not implemented yet. These logs are
just for testing.