disablewallet=1
printtoconsole=1
rpcauth=jfjobidon:123...xyz
testnet=1
txindex=1
server=1
rpcport=8332

var clientBTC = new bitcoin.Client({
    host: 'bitcoin',
    port:  8332,
    user: 'jfjobidon',
    pass: 'Lw.....='
});

version: "3"
services:
  watchblockchain:
    build: ./watchBlockchain
    depends_on:
      - redis
    deploy:
      replicas: 1
      restart_policy:
        condition: on-failure
  redis:
    image: redis:4.0
    command: redis-server --appendonly yes
    ports:
      - "6379:6379"
    deploy:
      placement:
        constraints: [node.role == manager]
    command: redis-server --appendonly yes

Error: connect ECONNREFUSED 127.0.0.1:8332