This is a Flask-based web server example, with an endpoint available for testing WebSocket with Socket.IO<https://socket.io/>.

The container image includes a uWSGI as frontend server.

• /: Redirects to /static/index.html.
• /static/index.html: A basic Socket.IO application.
• /socket.io: The endpoint for Socket.IO (WebSocket).

Note: There is a known issue in Docker that gives extremely high open files count, some cases can have "unlimited". See unbit/uwsgi#2299, cri-o/cri-o#7703 and moby/moby#38814 for more detail on ulimit settings for containers.

The example below provides a workaround for this problem.

```sh docker run -d -p 0.0.0.0:8080:8080 --ulimit nofile=4096:4096

ghcr.io/jacky9813/sample_server

```

`sh git clone https://github.com/jacky9813/sample_server cd sample_server python3 -m venv .venv source .venv/bin/activate pip install -e . flask --app sample_server.app run -h 127.0.0.1 -p 8080 `