Use a single alpine/sockat container for port mapping for each environment

[se7entyse7en]

Currently, the container corresponding to an environment is started without mapping any port. Mapping a port would require a restart of the container. To avoid the restart, port mapping is achieved by forwarding the tcp traffic using an alpine/socat container. But currently a container for each port is spun up, this could be improved by using a single alpine/socat container to handle all the ports forwarding.

[stale]

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[se7entyse7en]

This is not trivial.

If multiple ports must be opened in the same command, then it's easy to achieve. We just need to run multiple socat instances inside the same container. The problem is that if multiple ports are requested on different commands. The second command would need that the port mapper already has the newly requested port open.

An idea could be to restart the port mapper container which most probably is less expensive than restarting the environment container, but all the traffic flowing in currently open ports will break and this is unexpected to the user.