nginx-proxy/test/test_logs/test_log-json-format.yml

services:
  nginx-proxy:
    environment:
      LOG_FORMAT: '{"time_local":"$$time_iso8601","remote_addr":"$$remote_addr","request":"$$request","upstream_addr":"$$upstream_addr"}'

  web1:
    image: web
    expose:
      - "81"
    environment:
      WEB_PORTS: "81"
      VIRTUAL_HOST: nginx-proxy.test