No connection, please specify web3host in conf.json

No connection, please specify web3host in conf.json
[1] node app.js exited with code 1
[0] Error: Web3 connection time out trying to get block undefined retrying connection now

I do not understand which parameter is rwong

{
"nodeAddr": "localhost",
"gethPort": 8545,
"startBlock": 0,
"endBlock": "latest",
"quiet": true,
"syncAll": true,
"patch": true,
"patchBlocks": 100,
"settings": {
"symbol": "ETC",
"name": "Ethereum Classic",
"title": "Ethereum Classic Block Explorer",
"author": "Elaine"
}
}

Start with app.js and the conf.json settings shown in the issue. Reproduce the connection timeout against the configured localhost node, then trace how nodeAddr, gethPort, and the reported web3host setting are read. Done means identifying the correct configuration parameter or documenting the required change so the explorer connects without the timeout.

Written by the indexing model from the issue text.