502 Bad Gateway on /healthcheck

[TheDoDoo]

Hello everyone,

I wanted to set up the OnlyOffice Document Server via Docker to use it with my Nextcloud.
However, I get the following message when I try to connect it to Nextcloud.

Fehler beim Anschließen (Server error: `GET https://xxx.com/healthcheck` resulted in a `502 Bad Gateway` response:

502 Bad Gateway

502 Bad Gateway
ngin (truncated...)
)

root@nextcloud:/docker/onlyoffice-documentserver# curl -I http://127.0.0.1:7080/welcome/
HTTP/1.1 200 OK
Server: nginx
Date: Tue, 28 Jan 2025 18:52:32 GMT
Content-Type: text/html
Content-Length: 4948
Last-Modified: Tue, 28 Jan 2025 18:48:07 GMT
Connection: keep-alive
Vary: Accept-Encoding
ETag: "67992667-1354"
Expires: Wed, 28 Jan 2026 18:52:32 GMT
Cache-Control: max-age=31536000
Accept-Ranges: bytes

root@nextcloud:/docker/onlyoffice-documentserver# curl -I http://127.0.0.1:7080/healthcheck/
HTTP/1.1 502 Bad Gateway
Server: nginx
Date: Tue, 28 Jan 2025 18:52:38 GMT
Content-Type: text/html
Content-Length: 150
Connection: keep-alive

This is my configuration. Did I make any mistakes?
(I am using Nginx Proxy Manager as a reverse proxy.)

docker-compose.yml

services:
  onlyoffice-documentserver:
    image: onlyoffice/documentserver
    container_name: onlyoffice-documentserver
    depends_on:
      - onlyoffice-postgresql
      - onlyoffice-rabbitmq
    environment:
      - DB_TYPE=${DB_TYPE}
      - DB_HOST=${DB_HOST}
      - DB_PORT=${DB_PORT}
      - DB_NAME=${POSTGRES_DB}
      - DB_USER=${POSTGRES_USER}
      - DB_PASSWORD=${POSTGRES_PASSWORD}
      - AMQP_URI=${AMQP_URI}
      # Uncomment strings below to enable the JSON Web Token validation.
      - JWT_ENABLED=true
      - JWT_SECRET=${JWT_SECRET}
      #- JWT_HEADER=Authorization
      #- JWT_IN_BODY=true
    ports:
      - '7080:80'
      - '7443:443'
    stdin_open: true
    restart: always
    stop_grace_period: 60s
    volumes:
      - ./onlyoffice/Data:/var/www/onlyoffice/Data
      - ./onlyoffice/log:/var/log/onlyoffice
      - ./onlyoffice/cache:/var/lib/onlyoffice/documentserver/App_Data/cache/files
      - ./onlyoffice/example_files:/var/www/onlyoffice/documentserver-example/public/files
      - ./onlyoffice/fonts:/usr/share/fonts

  onlyoffice-rabbitmq:
    container_name: onlyoffice-rabbitmq
    image: rabbitmq
    restart: always
    expose:
      - '5672'

  onlyoffice-postgresql:
    container_name: onlyoffice-postgresql
    image: postgres:12
    environment:
      - POSTGRES_DB=${POSTGRES_DB}
      - POSTGRES_USER=${POSTGRES_USER}
      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
    restart: always
    expose:
      - '5432'
    volumes:
      - ./pgsql_data:/var/lib/postgresql

.env

DB_TYPE=postgres
DB_HOST=onlyoffice-postgresql
DB_PORT=5432

POSTGRES_DB=onlyoffice
POSTGRES_USER=onlyoffice
POSTGRES_PASSWORD=<PASSWORD>

AMQP_URI=amqp://guest:guest@onlyoffice-rabbitmq

JWT_SECRET=<SECRET>