fix: Exit docker container on any process exit (#462)

## Description
Issue described in #460

## Changes

- Edited `supervisord.conf` to exit if it detects any of the supervisored processes exiting.
- minor text fix

## Notes

Without this change (or something similar), if act_runner fails, then the container will stay up as a zombie container - it does nothing and does not restart. After this change, if act_runner fails (e.g. due to Gitea instance being down), then supervisord will exit and the container will be restarted.

Reviewed-on: https://gitea.com/gitea/act_runner/pulls/462
Reviewed-by: Lunny Xiao <[email protected]>
Co-authored-by: davidfrickert <[email protected]>
Co-committed-by: davidfrickert <[email protected]>

internal/pkg/envcheck/docker.go

@@ -27,7 +27,7 @@ func CheckIfDockerRunning(ctx context.Context, configDockerHost string) error {
 
 	_, err = cli.Ping(ctx)
 	if err != nil {
-		return fmt.Errorf("cannot ping the docker daemon, does it running? %w", err)
+		return fmt.Errorf("cannot ping the docker daemon, is it running? %w", err)
 	}
 
 	return nil