Can’t get through a HTTP 500

I am doing a docker Setup with two nginx configs
One of them is running locally (Ubuntu), without any problem
But on remote (Ubuntu) it is not working.

My Compose File

nginx_be:
    container_name: bx-nginx-be
    image: nginx:1.15.3-alpine
    restart: on-failure
    volumes:
      - "./docker/nginx_be/default.conf:/etc/nginx/conf.d/default.conf:ro"
      - "./_backend:/app"
    ports:
      - "${PORT_NGINX_BE}:80"
    depends_on:
      - php
    environment:
      - FRONTEND_URL=${FRONTEND_URL}

  php:
    container_name: bx-php
    user: "${WORKSPACE_PUID}:${WORKSPACE_PGID}"
    volumes:
      - "./_backend:/app"
      - "./temporary/composer/cache:/.composer/cache"
    build:
      context: .
      dockerfile: docker/php/Dockerfile
      args:
        - PUID=${WORKSPACE_PUID}
        - PGID=${WORKSPACE_PGID}
        - TZ=${WORKSPACE_TIMEZONE}
    restart: on-failure
    env_file:
      - .env
    environment:
      COMPOSER_MEMORY_LIMIT: -1

As mentioned before, this works fine.

On my remote server, the same returns me a 500
And I cannot set the error reporting to see what is wrong
I debugged it with var_dumps, but fond no error. Debugged endles, didn’ t meet the end.

This is my .env file for docker

PORT_NGINX_FE=8081
PORT_NGINX_BE=8082
PORT_MYSQL=8083
PORT_ADMINER=8084
PORT_MAILHOG_1=8085
PORT_MAILHOG_2=8086
FRONTEND_URL=localhost
WORKSPACE_PUID=1000
WORKSPACE_PGID=1000
WORKSPACE_TIMEZONE=UTC

And this is my laravel .env.

APP_NAME=Bx
APP_ENV=local
APP_KEY=base64:+oJfQmeu6q/FfPiWc8Iu0cj9aP39/UUQe9M5s2HwoIc=
APP_DEBUG=true
APP_URL=http://localhost

LOG_CHANNEL=stack
LOG_DEPRECATIONS_CHANNEL=null
LOG_LEVEL=debug

DB_CONNECTION=mysql
DB_HOST=mysql
DB_PORT=3306
DB_DATABASE=bx
DB_USERNAME=user1234
DB_PASSWORD=pass1234

BROADCAST_DRIVER=log
CACHE_DRIVER=file
FILESYSTEM_DISK=local
QUEUE_CONNECTION=sync
SESSION_DRIVER=file
SESSION_LIFETIME=120

MEMCACHED_HOST=127.0.0.1

REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379

MAIL_MAILER=smtp
MAIL_HOST=mailpit
MAIL_PORT=1025
MAIL_USERNAME=null
MAIL_PASSWORD=null
MAIL_ENCRYPTION=null
MAIL_FROM_ADDRESS="[email protected]"
MAIL_FROM_NAME="${APP_NAME}"

AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_DEFAULT_REGION=us-east-1
AWS_BUCKET=
AWS_USE_PATH_STYLE_ENDPOINT=false

PUSHER_APP_ID=
PUSHER_APP_KEY=
PUSHER_APP_SECRET=
PUSHER_HOST=
PUSHER_PORT=443
PUSHER_SCHEME=https
PUSHER_APP_CLUSTER=mt1

VITE_APP_NAME="${APP_NAME}"
VITE_PUSHER_APP_KEY="${PUSHER_APP_KEY}"
VITE_PUSHER_HOST="${PUSHER_HOST}"
VITE_PUSHER_PORT="${PUSHER_PORT}"
VITE_PUSHER_SCHEME="${PUSHER_SCHEME}"
VITE_PUSHER_APP_CLUSTER="${PUSHER_APP_CLUSTER}"

Cache is cleared, container has been rebuild, removed images before…
Cannot even see which ini is valid and nothing to see in docker logs ***

Any hint ??