How to run

1. start by cloning the repo than install php dependencies

   composer install

2. Start mercure using this command (docker used):

   docker run -e JWT_KEY='!ChangeMe!' \
    -e CORS_ALLOWED_ORIGINS="*" -e PUBLISH_ALLOWED_ORIGINS='*' \
    -e DEBUG=1 -p 9090:80 dunglas/mercure:v0.10.2

3. Run the symfony 4 app using:

   php -S localhost:8000 -t public

N.B: Open the chat url http://localhost:8000/chat in two different browsers, also you can open http://localhost:8000/client to view all old message

original code 1