Nextcloud host not found in upstream (Docker, nginx, postgres)

🚧 Installation
1

Hello

I want to run my nextcloud in separate containers. I followed the notes from github: https://github.com/nextcloud/docker/tree/master/.examples/docker-compose/insecure/postgres/fpm

Current state is that all containers start fine and do not report any issues. But I can not reach the nextcloud setup page under cloud.DOMAIN.ch. What I am receiving is the 404 page not found of nginx, so that should be working all right.

Postgres:

docker@docker:~$ docker container logs postgres 

PostgreSQL Database directory appears to contain a database; Skipping initialization

2020-04-15 18:22:01.961 CEST [1] LOG:  starting PostgreSQL 12.2 (Debian 12.2-2.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
2020-04-15 18:22:01.969 CEST [1] LOG:  listening on IPv4 address "0.0.0.0", port 5432
2020-04-15 18:22:01.969 CEST [1] LOG:  listening on IPv6 address "::", port 5432
2020-04-15 18:22:01.979 CEST [1] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
2020-04-15 18:22:02.026 CEST [26] LOG:  database system was shut down at 2020-04-15 18:21:54 CEST
2020-04-15 18:22:02.040 CEST [1] LOG:  database system is ready to accept connections

Nextcloud:

docker@docker:~$ docker container logs nextcloud 
Initializing nextcloud 18.0.3.0 ...
Initializing finished
New nextcloud instance
[15-Apr-2020 16:53:56] NOTICE: fpm is running, pid 1
[15-Apr-2020 16:53:56] NOTICE: ready to handle connections

Nginx:

docker@docker:~$ docker container logs nginx
172.18.0.2 - - [15/Apr/2020:18:54:10 +0200] "GET / HTTP/1.1" 404 153 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:75.0) Gecko/20100101 Firefox/75.0" "XXX.XXX.98.43"

The corresponding docker-compose:

postgres:
    container_name: postgres
    image: postgres:latest
    restart: always
    volumes:
      - ${CONFIG}/postgres:/var/lib/postgresql/data
    networks:
      - traefik_proxy
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - TZ=Europe/Zurich
      - PGDATA=/var/lib/postgresql/data/pgdata \
      - POSTGRES_PASSWORD=nextcloud
      - POSTGRES_DB=nextcloud
      - POSTGRES_USER=nextcloud

  nextcloud:
    container_name: nextcloud
    image: nextcloud:fpm-alpine
    depends_on:
      - postgres
    networks:
      - traefik_proxy
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - TZ=Europe/Zurich
      - POSTGRES_HOST=postgres
    volumes:
      - ${CONFIG}/nextcloud:/var/www/html
    restart: always

  nginx:
    container_name: nginx
    image: nginx:latest
    volumes:
      - ${CONFIG}/nginx/www:/var/www
      - ${CONFIG}/nginx/:/etc/nginx
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - TZ=Europe/Zurich
    networks:
      - traefik_proxy
    restart: always
    depends_on:
      - nextcloud
    networks:
      - traefik_proxy
    labels:
      - traefik.enable=true
      - traefik.http.services.nginx.loadbalancer.server.port=80
      - traefik.docker.network=traefik_proxy
      - traefik.http.routers.nginx.rule=Host(`cloud.DOMAIN.ch`)
      - traefik.http.routers.nginx.entrypoints=https
      - traefik.http.routers.nginx.priority=10
      - traefik.http.routers.nginx.tls.certresolver=letsencrypt
      - traefik.http.routers.nginx.tls.domains[0].main=*.DOMAIN.ch
      - traefik.http.routers.nginx.tls.domains[0].sans=DOMAIN.ch
      - traefik.http.middlewares.nginx.headers.SSLRedirect=true
      - traefik.http.middlewares.nginx.headers.STSSeconds=315360000
      - traefik.http.middlewares.nginx.headers.browserXSSFilter=true
      - traefik.http.middlewares.nginx.headers.contentTypeNosniff=true
      - traefik.http.middlewares.nginx.headers.forceSTSHeader=true
      - traefik.http.middlewares.nginx.headers.SSLHost=
      - traefik.http.middlewares.nginx.headers.STSIncludeSubdomains=true
      - traefik.http.middlewares.nginx.headers.STSPreload=true
      - traefik.http.middlewares.nginx.headers.frameDeny=true

What am I missing? It seems like nginx can’t read the FPM stream…

Thanks for any help!