Stop container

Signal (optional) is the signal to send to the container to (gracefully) stop it before forcibly terminating the container with SIGKILL after the timeout expires. If not value is set, the default (SIGTERM) is used.

Timeout (optional) is the timeout (in seconds) to wait for the container to stop gracefully before forcibly terminating it with SIGKILL.

• Use nil to use the default timeout (10 seconds).
• Use '-1' to wait indefinitely.
• Use '0' to not wait for the container to exit gracefully, and immediately proceeds to forcibly terminating the container.
• Other positive values are used as timeout (in seconds).