Optimize .html compilation time

[ryukinix]

1. Run emacs as daemon first by running a named Docker container without --rm
2. Compile the .html files by using docker exec with same named container created at (1)
3. Kill the named container created in task (1)

[ryukinix]

As well change /tmp mountpoint to /workspace. There is no need to pass -w again too. Look here: https://github.com/commonlispbr/docker-emacs/blob/master/Dockerfile