go/coverage/config/demo_spanner.json

{
    "database_type": "spanner",
    "database_name": "coveragemapping",
    "database_host": "127.0.0.1",
    "database_port": 5432,
    "service_host": "127.0.0.1",
    "service_port": "8007",
    "prom_port": ":20001"
}