即使API响应为200，也会出现502错误的网关

Question

我有一个正在处理API请求的应用。由于过程较长，因此应用程序响应所需的时间约为70秒，但是traefik会在10秒前返回502网关错误的响应。

version: '3.7'

services:
  web_server:
    image: traefik:v2.2
    restart: always
    ports:
      - "80:80"
      - "443:443"
      - "8080:8080"
    command: 
      - "--providers.docker=true"
      - "--accesslog=true"
      - "--api.insecure=true"
      - "--log.level=DEBUG"
      - "--api.dashboard=true"
      - "--entrypoints.web.address=:80"
      - "--entrypoints.websecure.address=:443"
      - "--entrypoints.websecure.transport.respondingtimeouts.writetimeout=240"
      - "--entrypoints.websecure.transport.respondingtimeouts.idletimeout=240"
      - "--entrypoints.websecure.transport.respondingtimeouts.readtimeout=240"
      - "--serverstransport.forwardingtimeouts.responseheadertimeout=240"
      - "--serverstransport.forwardingtimeouts.idleconntimeout=240"
      - "--serverstransport.forwardingtimeouts.dialtimeout=240"
      - "--providers.docker.network=network_default"
      # - "--entrypoints.web.http.redirections.entrypoint.to=websecure"
      - "--certificatesresolvers.cosec.acme.httpchallenge=true"
      - "--certificatesresolvers.cosec.acme.httpchallenge.entrypoint=web"
      - "--certificatesresolvers.cosec.acme.email=xxx@example.com"
      - "--certificatesresolvers.cosec.acme.storage=/data/acme.json"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - traefik_data:/data
      # - /dev/null:/traefik.toml
    stop_grace_period: 120s
    deploy:
      update_config:
        order: start-first
    logging:
      driver: "json-file"
      options:
          max-file: 5
          max-size: 10m