Docker mercure not sending updates with symfony - symfony

Question

I made simple docker based application with NGINX, PHP, PostgreSQL, Node, Mercure and Symfony just to test the capabilities of Mercure.
The problem is that I'm not getting any updates from Symfony publisher service, there's no errors in logs, no errors in Symfony profiler, CORS is working properly. Sending updates trough mercure ui is working just fine.
I'm using latest dunglas/mercure image along with PHP 7.4 and Symfony 5.2.2
My docker-compose file:
version: '3'
networks:
backend:
services:
# nginx
nginx-service:
image: nginx:stable-alpine
container_name: nginx-container
ports:
- "8080:80"
volumes:
- ./app:/var/www/project
- ./nginx/default.conf:/etc/nginx/conf.d/default.conf
depends_on:
- php74-service
- postgres11-service
networks:
- backend
# php
php74-service:
build:
context: .
dockerfile: ./php/Dockerfile
container_name: php74-container
ports:
- "9000:9000"
volumes:
- ./app:/var/www/project
networks:
- backend
#postgres
postgres11-service:
image: postgres:11-alpine
container_name: postgres11-container
ports:
- "5432:5432"
volumes:
- ./postgres:/var/libpostgresql/data
restart: always
environment:
POSTGRES_USER: main
POSTGRES_PASSWORD: secret
networks:
- backend
# node
node-service:
image: node:latest
container_name: node-container
volumes:
- ./app:/var/www/project
working_dir: /var/www/project
networks:
- backend
# mercure
mercure:
image: dunglas/mercure:latest
volumes:
- ./Caddyfile:/etc/caddy/Caddyfile
container_name: mercure-container
ports:
- 9090:80
networks:
- backend
My Caddyfile configuration
{
# Debug mode (disable it in production!)
debug
# HTTP/3 support
experimental_http3
}
# The address of your server
localhost:80
# enable logs
log
route {
# redirect to ui
redir / /.well-known/mercure/ui/
mercure {
demo
# Publisher JWT key
publisher_jwt !ChangeMe!
# Subscriber JWT key
subscriber_jwt !ChangeMe!
cors_origins http://localhost:8080
publish_origins http://localhost:8080
anonymous
}
respond "Not Found" 404
}
My .env cofiguration of mercure: (default token with !ChangeMe! key)
MERCURE_PUBLISH_URL=http://mercure/.well-known/mercure
MERCURE_JWT_TOKEN=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJtZXJjdXJlIjp7InB1Ymxpc2giOltdfX0.Oo0yg7y4yMa1vr_bziltxuTCqb8JVHKxp-f_FwwOim0
Symfony function:
public function push(PublisherInterface $publisher): Response
{
$update = new Update(
'test',
json_encode(['status' => 'new update'])
);
// The Publisher service is an invokable object
$publisher($update);
return new Response('published!');
}