* Add description for docker detahced
I added how to run in detached mode, see the container running and get info and how to attach to container.
* Fix typo in docker detached part
* Translate challenge subtitles and example challenge text to Spanish
* Corrected errors in syntax and punctuation
* Multiple corrections of it/s to its plus other grammar corrections
* Correction and added paragraph to CSS Flex article
* Corrected my own typo
* Corrected capitalization, American spellings and typos
Kingsjo1
Robin
Kosmas Chatzimichalis
S.Hale
faisal sayed
Mrugesh Mohapatra